Cadence thanks for your two great problems! In reverse order if I may.
2. If this is bizarre and terrible hardcoded path really the only problem, my punt is to
mkdir -p /home/j86585o3/common-lisp/ cd /home/j86585o3/common-lisp/ git clone https://codeberg.org/TurtleWare/cl-dejavu
though I would encourage you to build it yourself!
1. You can very easily install quicklisp as outlined here: https://www.quicklisp.org/beta/. Basically roll your eyes a bit at it being called a beta. One more decade...
https://www.quicklisp.org/beta/
The short and guided installation should end up with basically
(load "~/quicklisp/setup.lisp")
in your ~/.sbclrc file. (sbcl init file), assuming you installed it accepting the defaults.
1b. As referenced by the McCLIM developer JackDaniel here https://functional.cafe/@jackdaniel/112484865422197566 about this, you should manually acquire Xach's (of quicklisp.org) https://github.com/xach/zpb-ttf, similarly to cl-dejavu above (non-github download: https://xach.com/lisp/zpb-ttf/).
Please report back in!