Hosting/Domain name consolidation to Google

I run a small accommodation business and have a couple of domains. But the setup is very complex from my perspective: - Webcity, Netregistry, DomainClub, ClicknGo, eNom, Google, GoDaddy are all involved for hosting, domain name registration and who knows what else. I don't know why I need all these organisations involved. I just have: - an email account via google - two domains (.com and .[login to view URL]) - one simply redirects to the other, which then redirects to a page on an accommodation listing website - no website of my own I need help to simplify the setup and ideally with just one company, preferably google. I want solid step-by-step instructions to establish and migrate to a new setup.