Top threaded needle will not grab bobbin thread so I can begin sewing.

If you haven't already, install a brand new needle. Be sure to use good quality thread--no old stuff or bargain bin variety.

Remove all the thread from the machine.

Raise the needle until it is at the highest point it will reach before it begins to lower.

RAISE the presser foot and rethread from the beginning--verify the thread path is correct. Pull at least 5 inches of thread tail through the needle.

Check that the bobbin is installed correctly.

Set the upper tension to somewhere around the midway point between high & low number.

Pull the bobbin thread to the top of the fabric:
How and Why to Bring up the Bobbin Thread

When you begin to stitch, gently hold both thread tails with your left hand and begin stitching slowly to start.

Why does my thread keep pulling out of needle

Tilly and the Buttons Five Common Sewing Machine Mistakes How to Fix Them

...

Always--install a brand new needle. A bent/dull/damaged needle may not pick up the bobbin thread.

Remove the thread from the machine. Always Raise The Presser Foot and rethread from the beginning. Make sure the thread seats completely in the tension disk and the thread path is correct.

Test your machine. If it still fails to pick up the bobbin thread, then your machine may have a timing issue (the needle is arriving at the bobbin at the wrong time in order to intercept with the bobbin thread).

There are many web sites and videos explaining sewing machine timing. Or, you can take it for service.

...

When you start sewing, make sure the thread is long enough so the machine does not pull the loose end down into the bobbin casing. It is best to drawn both threads (bobbin and top thread) up through the pressure plate before you place the fabric under the pressure foot.

try another needle-- one for the fabric being sewed

make sure the top thread has not come off the thread take up lever

clean under the needle plate and in the bobbin area for lint


make sure the bobbin is inserted into the bobbin case correctly

make sure the bobbin is turned the correct way in the bobbin case

after threading the needle pull about 6" of thread out the back under the press foot
that way the thread is jammed under the foot and is held in place for the next thread
bobbin thread should also be out the back
when you have finished sewing then lift the foot and move the material sewed about 6"" away from the foot before cutting the threads

First, make sure the needle is installed correctly. Then when you thread through the needle, it should go through the hole so that the thread basically lies inside the groove that runs down the side of the needle. These two steps are critical to being able to pick up the thread properly!! Typically the thread feeds from the left side or some from the front.
Secondly, make sure the bobbin is loaded correctly and firmly attached in place. The thread should just hang off the outside of the bobbin.
Hold onto the upper thread and manually turn the machine through the start of a cycle. When the needle goes into the top plate and down toward the bobbin, a hook should grab the top thread, rotate it about straight down (6 o'clock position) and then release it to grab the bobbin thread. Continue slowly turning the machine manually until you see (hopefully) the thread from the bobbin. Use something thin to pull both threads to the rear, under the foot, and all should be good. When you first start to sew, you might need to hold onto the top thread so it is not pulled out of the needle.
My guess is if you have done all the above, you could have a timing problem that needs to be adjusted at a repair shop.

the looping on the underside sounds like a needle thread tension problem. 1st off check top (needle) threading then turn machine by hand to pick up bobbin thread

Make sure that you have the needle's flat side facing the rear of the machine, or else it will never grab the thread. Also, make sure you hold the top thread in your left hand until it grabs the thread and you pull the bobbin thread up

Sometimes you have inserted the needle wrong, make sure that the needle faces the rear, if that is not it, try a new needle. Make sure that you have threaded the bobbin right, by your manual, and have at least a 6 inch tail, hold your top thread and move your handwheel towards you, not away from you and it will grab the thread. If any questions go to euro-pro.com

Most likely the needle is in backwards. Weird I know, I have no idea why but if the needle is in wrong, it either hits the bobbin and breaks or won't grab the thread at all. Good luck.