what mother board do you have, or are getting? It'll depend on that too. Also, if you haven't checked it out,Link To Site ---> PCPARTPICKER <--- it will tell you if your parts are compatible or not.
Hey man I built this pretty fast. Change stuff out as needed. I added all the things you'll need. I assumed you didn't have keyboard, mouse, monitor, or thermal paste. Your Build
Yeah dude you should de-dust your computer. You should also do some pc care by check all your connections, and also for any corrosion(rust). Have you also tried to access the boot screen?
Do you have any other keyboards? Are you able to check for new software for your keyboard and mouse? If so check up on that. Also have you tried another USB port?
If the loading bar is going, just let it load. If the screen is just frozen, just restart the computer and try again. My computer did that to me once before.