is it normal to have 13 peers and 50mb mempool?
Anything 125 peers and below is "normal",Are you asking why you have 13 outbound peers instead of the "8+2(+1 temp)" maximum?
If so, you might have used "addnode" that included the extra 2 or 3 more peers, it can include additional 8 peers.
Reference: github.com/bitcoin/bitcoin/blob/master/doc/reduce-memory.md?plain=1#L25-L33
For the 50MB mempool, that depends on how many unconfirmed transaction your node has accepted so far.
Question; is your node still in 'initial block download' state?
And you put little to no information; settings, command line args?
