The drain for the Torque Converter is not necessarily visible. You have to rotate the engine in the normal direction( important) in which it turns until you can see the plug in the opening in the the casting. You do this either with a socket on the cranskshaft nut at the front of the engine or by levering a large screwdriver gently against the torque converter to move it around. It is an internal allen. You will need a allen stub in a socket. Can't recall the size.

Yes, you pour the fluid down the dipstick tube.

Sounds like this is very new to you. Do not crawl under there unless you have the car safeguarded with proper jackstands!

Do a search on this forum and you will find step by step instructions. Do not wipe the dipstick, or the inside of the pan with paper towels. Use only something lint free. Be careful to not get any loose particles of dirt inside the transmission.

Buy a small funnel that will fit the top of the tube.

You will find that the there is a locked cap on top of the dipstick tube. Press the red thing down to unlock it. You are supposed to buy a new cap. I just re-used the same one. Press the red thing out and put it back in the top. Works just fine.

Good Luck,

Steve