Electrical tape, really?
I can't really say owt because I am the worst at looking after my AEGs. Plan for upgrading my MP5 is back on though as I'm not buying any more gear or guns for a while except for a new sidearm (which I am gonna maintain btw, bought maintenace gas, silicone oil etc with the P226)
Just watch a lot of videos, ask questions on here if you're stuck on anything specific (it's like the main reason the forum is here so don't be afraid if you think it's something obvious or a stupid question) Take you time with it and preferably make sure you have a good clear work area with a gun mat or summut like a towel so you can lay out parts and not lose them too easily.