Okay so I'm fairly new to bike maintenance (I change my oil and have done simple mods like tail chop, and replaced the handlebars, turn signals and tail light). After watching the vidoes and checking out the tutorials on removing and replacing the wheels it doesnt seem technically that challenging. Should I be worried about putting the wheels back on correctly? (cause I am) I dont want to end up on the pavement cause I didnt put my wheels back on correctly. I worry about the alignment and placement e.g. is it centered? is it too far forward or back on the swingarm? is the chain too loose now? etc. Also re-applying the brake calipers is that simple? I dont want to tackle something I could potentially screw up easily and regret doing myself. I'm just looking for either : this is simple stuff that you cant really screw up if you follow the tutorials ...or.... there's some complexity there that might best be left to professionals if you're unfamiliar.
I like doing these things myself and learning but not if I'm putting myself and my bike at risk.

Same here...I did a lot of reading and researching before doing anything.
Just be patient and slowly work your way to it.