Everybody's a mechanical virgin once. It plays the biggest factor in troubleshooting issues as they come up vs posting all over the internet and waiting until someone who's run into the issue before can find it. IE - you've got the new motor in, but it won't fire because of an intermittent short somewhere in the lead to the coil. Or the rear main seal goes out a week after you button it back up and put it on the road, or you wind up with wrong parts from the store (happens to everybody eventually) etc. Second hand parts will always come with their headaches, and transplanting an entire driveline almost always brings them out.
Things that will make completion more likely -
A garage / safe space to work on the vehicle
Tools - Hand/air/whatever you can get your hands on. You'll definitely need stands and a cherry picker (engine hoist)
Having a COMPLETE swap ready to go
Organization - Labeling nuts/bolts/sensors/harness connectors so you know where they go later
Electrical experience - Can you track down a short, or use the service manual to diagnose faults? (If not, you'll be learning)
Not counting on local help - It's nice to have a friend next door, but waiting for help can stretch things out.
Doing things correctly from the start. Shortcuts almost always bite you in the ass.
Start a build log. Might bump your motivation knowing others are watching.
Living somewhere in SoCal... Seems like the 86 guys are more common around there than herpes at Cancun during spring break.
Being willing to go elbow deep and not sit around wondering about finishing the project.
That said - It might make more sense to just rock the DX and put your money aside for housing/college/business. Trying to mod a car and go house hunting doesn't go hand in hand, lol. Not knocking the dream, just been around to watch it happen. Fun car living under a cover in the apartment parking lot waiting to get stripped/hit, all the while getting torn into because you're not allowed to work on it there.
Odds are you've got a friend locally you can help with more advanced mechanical work first as well. (heads, brakes, suspension, etc...) Even if you just run for tools, you'll learn as you go.