Question Small business site on Plesk, what is your simple backup, email and SSL checklist?

[Kacey Noms]

Hi everyone, I am Kacey, a letting agent based in Birmingham. Our agency website runs on Plesk, and I am not very technical, I just need the site to work reliably because landlords and tenants use it every day to contact us and view listings.

I have had three small problems already, and I would love a simple checklist from people who do this properly:

1. Backups, how often do you back up a small business site, and do you keep a copy off the server as well?
2. Email, after moving our domain, some of our emails to landlords started going to spam. I have checked SPF and DKIM, what else should a non-technical owner check first?
3. SSL, we had a certificate auto-renew fail once and did not notice for a day. How do you keep an eye on expiry without checking it manually every week?

I do not need anything fancy, just the basic routine you would tell a small business owner who cannot afford downtime. Thanks in advance for any help.