Is it okay or should I worry about those black dots?

Nah, i do not think so, first of all i have a net since day 1 over the whole thing, secondly, all the other leaves are super healthy and bringing up buds, if a bug was the problem which i already read about in growingweedeasy website... Not even close to what it is, first i really tho it was something inside when i was reading it but then this other guy said that he got the same and everything went well and never affected the plant... I think ima go with that... Also those brown spots are talking more about a calcium deficiency or magnese which is more possible since its the first leave after its cotyledons and since it was my first time i wasnt feeding her as much as i had to, until week 4 that i literally saw how everyone else was adding plenty nutes twice a week or once but fully loaded nutes, i was like ok... i had to.. then i started and suddenly all of them started to grow, also not to mention there is 2 other ladies next to her sea of green and they are not showing up those conditions and the 3 of them are being fed up at the same time and were grown on the same enviroment plus they also have the same net, i appreciate your kind help dude but i do not think thats the case, thank you tho and happy growing!

I got no clue what bug it is, but it's definitely eating the inside of your leaves. So I'd be a little worried.

I'm really glad you mentioned that, phew I'm actually happy because she's growing very well and healthy and I'm really taking care of her and measuring ph, probably gonna reduce heat stress just in case lately outdoors have been rough times on this side of the world very warm weather good thing we have AC so they can get comfort after 3 hours direct sunlight... Thank you so much I really appreciate your help