There isn't an actual guide or instruction set that I have ever seen. Just all anecdotal collected from these forum posts.
I am quite familiar with the oozing problem you are having. That comes from a nozzle that is not seated properly in the heat block. The molten filament is able to ooze out of the threads after a while and covers your nozzle in a hot mess. Eventually causing little crispy bits to start dropping onto your print as well, and if you are really unlucky, oozing out sideways under the tool head bottom cover and creating a nice mess under there.
The good news: You can most likely fix it.
The bad news: You are going to have to take the nozzle off, and the bottom plate, and clean everything spotless. I use a combination of hobby knives, tweezers, dental picks, etc.
Then you need to look inside the heat block. A loupe or magnifying glass helps. You will see a short piece of PTFE tube. Hopefully, it is intact and straight, not mangled and looking like Earthworm Jim on a bad day.
What you must look at very carefully is the very end of that PTFE tube and make sure it is square, that is where the base end of the nozzle needs to meet with it and that joint needs to be flush.
If all is good up to this point, you are doing well. If not, you may need to VERY CAREFULLY with the precision of a brain surgeon trim that tube. Be extremely cautious and be absolutely certain before doing this. In fact, post a pic here first and get a second opinion, because it is just like brain surgery there is no going back, and that little piece of tubing is difficult to source for replacement.
Hoping your tube looked ok, take a small piece of Teflon tape aka plumbers tape and wrap it around the threads on the nozzle, more toward the nozzle end, not the inserted end. Double check the label on your Teflon tape to ensure that it is high-temp resistant (they almost all are), and then put the nozzle back in. You don't want so much tape that it becomes hard to install, you are just creating a little better seal.
Then put the nozzle back in. You kind of have to gauge by feel for the point when the nozzle bumps up to the PTFE tube. It should all be cooled off so you can reassemble by hand and feel for that contact point. Tighten it with your fingers as tighten as you can and then stop.
Now reconnect the Mini-USB C cable and heat it up, and using your wrench/socket/spanner give it a final 1/4 to 1/2 turn. Use another wrench to hold the heat block from rotating while you do this, and stop when it feels like it wants to stop, don't overtighten it. I don't have torque spec but it isn't massive, you are tightening a tiny nozzle under heated conditions, no need to Hulk it.
That should solve the oozing problem or by going through the process, alert you to any other problem.
Hmm, I said at the beginning, there was no guide. Maybe I just wrote one. Maybe if I can get some input from a few other regulars on here, opinions, advice, experiences, etc., then I will add some photos and put together a PDF.