Im doing something wrong?

Leaves wilting at the lower part normal or not good parameters? The top looks great but the bottom is brown leaves.

Looks good I would just cut those little ones off

I wouldn't worry about those two leafs (cotyledons)...I usually bury them while transplanting. Plant looks great!

Thanks

The plants look healthy, but that burning, and no, its not the cotyledons, that's the first set of true leaves burnt, i'm guessing maybe during watering, those 2 tips touched the water/soil and got burnt? If not, then i'd say watch for it to see it spreads higher because in that case, it's not something natural.

After a closer look on a pc monitor, def not the baby leafs but still not much to worry about.

Looks great but you should soak that whole pot when you water and let it get nice and light before soaking again. Those dry edges around the wet spot tell me you're not doing that yet.