You are right
servebeer.com is not included in PSL, anyway, right now you could issue a certificate for your domain (there are 10 remaining certs). Also, keep in mind that the rate limits have changed and now the limit are 20 certs per 7 days but what is more interesting, there is an exception to this limit for renewing certificates (issuing a new certificate with same names as a previous one) so doesn't matter whether domains for servebeer.com hit the 20 limit, if you already issued your cert, you could renew it.
I don't really understand what's your final goal so let me guess it.
You already have a domain
hanslammerts.servebeer.com and you use it because it is free and/or because it allows to perform Dynamic DNS Changes. Now you get your own domain
hanslammerts.nl and you want to use it as your main domain but I don't understand why you want to redirect
https://hanslammerts.servebeer.com If you perform that redirect, you will need 2 valid certificates, 1 for
hanslammerts.nl and 1 for
So, I think that you want to use
hanslammerts.nl but you need
hanslammerts.servebeer.com to update the dynamic ip of your home/office where you will serve your web site so I would recommend to change your DNS A records for
*.hanslammerts.nl and use a canonical name (CNAME) pointing to
hanslammerts.nl CNAME hanslammerts.servebeer.com
*.hanslammerts.nl CNAME hanslammerts.servebeer.com
Using this approach your main domain will point to your dynamic ip and you will only need certificates for your
hanslammerts.nl domains. Of course, you should configure your Apache to serve
hanslammerts.nl but you already did it for your servebeer.com domain so that should not be a problem to you :).
I don't know whether I made this post very clear or maybe I didn't understand your final goal so if you have any question, let me know.