Poor gal 2k per month.

Anaanika kwa jua kisha antafuna tafu-tafu!

poor dude, only one girl

Abit late though I guess still relevant, As soon as possible join a Sacco and have the 4k paid religiously every month. Make a mental note that your salo is 20.5k after sacco deduction and budget with that,to prevent the temptation of reducing the savings.
I like your idea of buying clothing and households soon, I wish I had done the same.(I avoided this to save everything to start a biz so I could make enough money to buy all that and remain rich but it's easier said than done but once you buy households they give u time to concretrate on bigger things.)
Most businesses(whatever size) require lots of time and other resources to get off the ground and alot of skill to sustain. Ain't discouraging you though, arm yourself with as much info as you need to start, sustain and benefit from a business if you will choose to go that way in future.
Meanwhile keep it as simple as possible(like u have narrated) until such a time that you have a strong foundation, for the journey ahead is a long one.
There is a theory that expenses increase to meet increased income so if you can avoid some of this temptation the better.
N just one more paraphrased statement from a man who was due to retire very rich,(for whomever it may be relevant,) we don't buy food, rent, fare etc when we get better salaries, saving should also be treated the same as one of those basic needs.)