As you mention in another comment that it's for your business and you don't want to spend time maintaining it once it's running I'd strongly suggest not to go t

As you mention in another comment that it's for your business and you don't want to spend time maintaining it once it's running I'd strongly suggest not to go that route and pay someone to do the work for you. If you do it for your personal email, experimenting around is probably fine for a while but for a business working email is mission critical. Mails getting stuck in filters somewhere, clients not seeing your emails because they got classified as spam along the way will just cost you money and will cause headaches. Just go with GSuite or Fastmail Business if you don't like Google.