You can change the soil. I wouldn't if it was me. Wait until they get a little bigger then transplant them into new dirt. Being that young, the roots are really fine and easy to fuck up. Plus there's not that many of them(roots), that's why I would advise against it.
But hey if you wanna change the soil, go for it. I would get a gallon jug, cut the top off big enough to stick your whole hand in it. Then take the plants out of their containers, shake off whatever dirt you can. Then dip them in the gallon jug full of water. Gently agitate/shake them with your hand until all the dirt comes off from the roots. Then transplant into new soil.
But.....if the roots get damaged, they will grow even slower than you think they are now. Those are doing fine for 11 days old. It looks like you might have thrips. If so some spinosad will wipe them out with a single application.(your leaves look like they are showing a little thrip damage.
But hey if you wanna change the soil, go for it. I would get a gallon jug, cut the top off big enough to stick your whole hand in it. Then take the plants out of their containers, shake off whatever dirt you can. Then dip them in the gallon jug full of water. Gently agitate/shake them with your hand until all the dirt comes off from the roots. Then transplant into new soil.
But.....if the roots get damaged, they will grow even slower than you think they are now. Those are doing fine for 11 days old. It looks like you might have thrips. If so some spinosad will wipe them out with a single application.(your leaves look like they are showing a little thrip damage.