Hi. You've probably already found the answer to your question, but we'll summarize.
The best option would be to purchase an anti-detect browser to which you need to add clean proxies.
First, such an option is much more convenient than several other browsers.
Secondly, in case of some blockages, you can create a new profile and add proxies there and continue to work further.
Thirdly, some antidetect-browsers have up to 10 free profiles (for example, Incogniton or Dolphin)
As for proxies, mobile proxies are the best option for registering profiles - they are the least likely to ban accounts immediately after registration. Other proxies often have a more negative effect.
To work with new accounts choose proxies according to the geography of the purchased account. Working from another ip leads to a large number of checks when entering and the error "wrong data" - when entering obviously correct data does not let you into the account. Both mobile and static proxy solutions are suitable.