Fiverr's 20% commission is too expensive. I checked the fees for other platforms similar to fiverr. It seems that other platforms are getting 5%~10% commission. Please personally confirm whether what I said is correct on these platforms. Unless you object, I suggest using these sites instead of Fiverr.
(1) Upwork
https://support.upwork.com/hc/en-us/articles/211062538-Freelancer-Service-Fees
(2) Freelancer.com (Note : Please check dormant fees)
(3) Toptal : I asked the Toptal about the fees. I am currently waiting for a response.