How to start? is there any help? how to gain your first costumer?
Start with these https://forum.fiverr.com/search?q=upyour
Your profile mentions “working for free” which is really of no advantage to you as a buyer has to buy your gig in order to leave a review. Suggest you also check out https://support.fiverr.com/ for how to get started on Fiverr.
Buyer request is another technique.