Does this mean even if you are not an old user but you have done all your achivements and you have a reputation of more than 58 and more than 100 sp you can still apply?

yes, correct, if you're newcomers coming to Steemit from the year of 2020-recent and have received your Pro Newcomers Verified title in this community, with a reputation account at minimum 58 and your own Steem Power of over 100 SP (steem power delegated to you not included) you are eligible to apply.