Clutch stick gets stuck and I can't change gears

so , it seems the engine does start in gear, with clutch depressed.
or cranks , brakes off, and car does not move. with clutch depressed, if yes, then the clutch is not 100% seized.
we now know the trans is in neutral (could be siezed check its Gear lub levels?)

I can not decode, stuck in gear. elaborate that.
nor "
"still stuck"
the only clue here, is
"stalls when clutch is let out."

this last statement makes me presume you depressed the clutch
then turn the key to start, it started
and when you let the clutch out, the engine stalls
does it do that rear wheels (2wd mode) ? lift driving wheels off the ground.... (these proves engine not weak)
yes, transmission is sized.
no, then it is stuck in gear.

CHANGE THE TRANSMISSION ASSEMBLY

Try bleeding ur clutch

Worn Clutch plate or thrust plate.

Check if hydraulic Clutch
if so check clutch fliud level . Could be a faulty clutch master cyclinder in hydraulic system.

lol u gotta take it apart and line up the plate again use the lining up tool or go buy one at autozone and follow torque specs but also check gear selector and stick shift cables etc before taking it off again

this could be a clutch issue. sometimes when clutches start to go bad they have trouble with the lower gears like first and reverse. if I were you I would try and get it looked at to make sure, but im pretty positive its the clutch.

clutch release bearing/pressure plate going fast,you need to replace asap or be stuck...change all 3 components at same time,

automatic or stick
sounds like a stick change the clutch or if it has a master cylinder for your clutch replace that or the slave cylinder

it needs a new clutch and preassure plate assuming it it a stick shift

Sounds like a bad overdrive clutch, it's in the torque converter and is not repairable, you have to replace the torque converter, this is somewhat common on high mileage automatics, usualy it sticks locked, when you put it in gear it makes a clang and unlocks, but locks up as you drive and won't unlock when you slow down like it's supposed to

sounds like this one simply will not go into gear at all, either the clutch is worn out (They're vry small snd weak) or possibly a sticking valve body.

this needs to go to the dealership garage, NEVER go to Mr Transmission type places they'll want to overhaul it whatever's wrong, they don't waste time on diagnosis