Beginner Help

Hey everyone! I'm just hoping someone can recommend a tutorial as there is so much information it is quite overwhelming!

A friend got me into building gunpla in December and I'm currently 8 kits in mostly HG and RG, and have 12 in backlog. I have just started my first MG, and have some 3rd party kits like the Apocalypse and Legion or Thor I am so excited to do but I want to work on panel lining first. My question is regarding the order of panel lining, painting and decals. As you can't panel line onto bare plastic, what is the best order to tackle these things in? Is there an undercoat recommended for spraying the model before panel lines and decals? Do I add decals after panel lining? I have some enamel and acrylic top coats although I don't want to spray an enamel on some pieces without a primer.

Any help would be so greatly appreciated! I have watched a lot of videos but they don't seem to break down the whole process, just certain parts 😅 so I am lost

Pictures are just a couple of my first models and a very poor attempt at playing with some acrylics in panel lines because I was bored (poor guy). Have the Tamiya panel line colours as well