Many of these types of algaes are common in new tank and should really be of no real concern at this point.
Green algae on the glass is a normal sign of phosphates and/or nitrates and as they tank matures will become less and less although they never really go away most times. Do you know the PO4
The "grass" like algae could be a simple but beneficial macro algae or nuisance hair algae. If the latter I would make sure it is hand pruned and kept short. If too long, you cleaning critters will most likely ignore it. If the former I would not worry.
Here's 2 links that will help ID
if not hair algae. Algae I Algae II
It will also depend on your source water. RO
is the recommended as many local waters (well, tap and such) contain many contaminants that fuel these algaes.
Your snails and crabs wil help with these issues but unfortunately the cleaners help will be indirect as they will only eat leftover foods.
Hang in there it will all be good in no time.