Welcome, I'm not techie either... Just start using it and figure the rest out as you go. Maybe put something in your profile about your interests and you'll get more followers... Biggest thing is to record you nsec in a safe place. That is your key to logging into your profile as you for all the various applications that nostr devs have made. 

Also never give out your nsec ID to anyone, anyone that has it can basically become you... 

You npub is your profile and your nsec is how you access it. 

Also consider getting a lightning wallet to be able to accept and send zaps!