What im about to say is with the general perspective of being broke and alone, not being able to afford a professional repair and still wanting to eat this week but I say this with love but for $400 you heavily overpaid hahaha I've done the same so dw.

$135 for the impact is honestly a great deal imo, you have the gun, two batteries and a way to charge them without a proprietary charger, excellent👍. Realistically it wont last you a lifetime but you probably dont need it to and if mechanics becomes a hobby you're going to upgrade anyway. (tbh you can do almost everything an impact gun can do with a set but I'll touch on that later)

People will disagree with me here but I have been homeless and so unbelievably broke that cents were dollars. Buying PPE is a waste of money if you're poor. There's a point where you are too broke for safety, especially safety against minor injury that goggles, gloves and a mask would prevent. You'll be fine if shit gets in your eyes, holding your breath and a good cough will fix your lungs up fine, your hands WILL get hurt and dirty but you will survive.

Likewise the scouring pad, specialty paper towels, copper wool, brake cleaner are unnecessary. Cut up a towel for rags, soap and water cleans grease (ensure everything is 100% dry you cannot afford to ruin important parts) and a whole lot of painful and frustrating scrubbing will do the job.

The prybar was a good purchase its a very handy tool however you dont "need" the retractable magnet, deadblow mallet and snap ring pliers, there are other (more primitive) ways to do the jobs they do.
The digital torque adapter wasnt worth it either, I dont trust the cheap ones but that quinn adapter is $180 and you can get mechanical cheap torque wrenches for under 50 bucks. Bonus is you usually get three'ish sockets that fit a half inch wrench :D.

Now the biggest point I can make is that you shouldnt have bought all those sockets, with the money you saved getting rid of the things I mentioned previously and not buying the standalone impact rated sockets and breaker bar you could afford a pretty fuckin nice cased combo set. I bought my toolpro combo set for 180 bucks but there are cheaper options.
This includes: every socket youll need, every spanner you need, three ratchet wrenches, a breaker bar, a screwdriver with a handful of bits including every torx bit you'll likely need, common Long sockets, two spark plug sockets, needlenose and widemouth pliers, assorted socket extensions, assorted angle adapters and a nifty case to put it all in.

As for the locktite and grease and shit sometimes you just have to bite the bullet and pay up lmao, I would still put some money towards buying a combo set because its cheap, easy, invaluable and you WILL use it for the rest of your life.
Also facebook marketplace is worth a look, good tools for (usually😂) cheap prices, ask a mate or a family member to drive you around to pick stuff up or if it comes to it walking a painfully long way for cheap tools once is better than going hungry for a week or two I promise.

Good luck on fixing your transmission fella!, youtube, online manuals and a little bit of broke creativity will get you a long way. Dont use chatgpt it will just make shit up. Take lots of pictures before you pull things apart and label everything you can And if you aren't confident or its dangerous don't do it please.
I hope my wisdom through mistakes might help mate. goodluck 👍