hiiiiiii everypony

so, im a veteran of the internet... born before computers and an OG deviantART cringe artist~ ;P
i used to LOVE creating custom CSS but im old and rusty now, i havent used sheezy art since the early 2000's, before the original site was shut down and we lost everything..... but im really looking forward to sharing my work and enjoying yalls, but im absolutely STUMPED where top start with a custom profile. if anyone has any tips and advice for me to get started i would appreciate it so much <33
ill draw you a doodle for the help!!