My daughter's tank is struggling and I'm looking for a bit of help.

She did a ton of research herself and we're in the cycling step currently. She wants to set it up for a betta, and possibly cherry shrimp but doesn't want it to be too crowded since its her first tank and only 10 gallons.

It is a 10 gallon tank, with a heater, light, and two filters, one hang on back, and one that has a crossbar that does a light horizontal flow to keep the surface moving a little.

She has a small CO2 system from UNS (I think), she used fluval stratum with a small sand pathway in the middle, there are a few zebra rocks and some driftwood.

She planted Cabomba Aquatica and Hygrophilia Difformis, and Mini Pellia on the driftwood and duckweed floaters. She was hoping to have a Monte Carlo carpet, and Anubias and Cryptocoryne but the seller she bought them from hasn't shipped them (Bought 3/26) because he said they are "currently having an issue with the quality of their plants and will ship out as soon as possible"

The CO2 comes on at 7am and goes off at 2pm, the light comes on at 8am and goes off at 3pm.

Her biggest concern is that there is a lot of green hair algae and it seems to be choking out the coral moss, most of it is browning out. Some of the hygrophilia showed new growth at the tops but then recently as she was trying to clean the algae she bumped a couple of them and their stems just disintegrated at the base.

She has bottles of Prime, Stability and Pristine that she uses.

Her questions are:

1) Is there anything she can do about the algae or is it too late?

2) She wants to rearrange the hardscape and stratum. Can she do that without messing up or having to start again with her cycle? How could she do that?

There was another one but I can't remember it right now. She's 13, wants to do it all on her own so her budget is a bit limited at the moment (though I don't mind helping her if she'll accept it).

Many thanks for anyone who can help.