First guitar ! Would love some advice ♥️

Hi ! Recently I turned 25 and decided why not go ahead and buy an electric guitar like I always wanted to, I play a little bit of piano and I love it but since I have the money and it was a special occasion I said "why not" and went for it

I got a Yamaha Pacifica 112V and some essentials, a stand, a strap, strap locks, a bunch of different sized picks from different materials and a fender mustang micro plus (yes I do have headphones for it and a laptop/tablet to use it)

What I'm trying to say is I'd love some advice Should I buy a case to "protect" it from dust or can I cover it with something light and soft? Any other essentials I might need soon? How do I know when to replace the strings and what type of strings to buy? Any YouTube channels you recommend to learn to play a bit and/or maintain the guitar?

Thanks in advance !