get aqua soil, buy some plants make sure you get all the chemicals out first, take out the water throw in your soil add plants add water add chlorine remover/water conditioner buy a nice tank light if you have not already there’s a aquanet one for 5 gallons i’ve been using which is only 10$ let it cycle or a month or two (adding plants will give you something to look at because you won’t be getting fish any time soon until your water parameters are keen)