Replace the water hoses
There are several, you probably want to start with ones that need it. Feel if they are hard/brittle, look for deterioration. Remember they can deteriorate inside, not just out. I always disconnect battery before working on anything. For upper and lower radiator, turn draincock on radiator when car cool and with something under catch antifreeze to dispose of as is hazardous, can kill pets. For home tools, pliers, needle nose pliers, screwdrivers to squeeze and pry off clamps. Remove and replace in reverse, refill at overflow, run with cap off 10 minutes, check level, fill if needed, drive, check coolant level again. Some things that might make it easier to reach are removing the coolant tank for more space but not mandatory, if you do, be careful of the ac sensor in front of it. For heater core, replace is same, identify and remove, or bypass. For the lines along wall back of engine, can by and replace assembled metal lines. Be very careful with the vacuum line coming off the MAF sensor to the top of engine or you will crack it and probably have to go to a junkyard for a new one, faster than finding elsewhere. At the circle it pries out with screwdriver but you leave it attached there and pop it off line going to MAF sensor and turn it toward front while you work, then remove air filter section to give yourself room to work on back wall.