Regarding service manuals, I’ve had good success purchasing a day or two of access to the manufacturers tech portal, then just downloading everything I think I’ll ever need. I did this with my Camry and got a pile of PDFs with all the OEM service manuals, TSBs and wiring diagrams for $20 and an afternoon of my time.
Mitsubishi seems to have something similar here (Mitsubishi Motors Service Information Retrieval), which ought to have OE procedures for just about anything.
I’ve found the OEM service manuals to be more reliable than something like a Hanes manual, but they aren’t perfect mind you. I’d still watch a YouTube video or corroborate info with other sources before getting into a repair.