hey welcome to the forum how much water changes you going to do. I personally just like some other people think that you do not need a filter in 2 gall tank. You can just do 1-50 and 1-100% water changes. It kind of difficult to establish cycle in that 2 gall tank.
Also if you really still want to do it you will need to vacuum the gravel 2 times a week, change water 2 times a week, rinse filter. Do you have questions on the water changes?