First time boot with amd can take up to 10 minutes depending on the brand, speed and timing of your ram. It’s training the memory, figuring out the best speeds and timing to use. It may do that up to three times but usually only once. After that it boots quick and easy. If it continues to do that with every boot, try changing out the ram (if you can) or try removing one stick and see how it does. Trade sticks after it settles and repeat. If the problem persists with one stick and not the other, replace the problematic one.