Paul

I am looking at the Online builder and hosting package but cannot see any limits on data. Presume there is a limit to the size of site I can build? Also, email addresses. Can I use my domain name to set up personalised emails and is there a limit to these?
I am doing this in my spare time for a community project. The web site does not need to be flashy but GDPR compliance is important. Finally, I am new to using Wordpress so a link to a beginners guide would be a help.
Thanks