Amazin!

hey guys, I've recently lost alot more weight staying at home decided to practice more discipline you know. I've done Omad for a couple months. I started drinking pine pollen and ashwagandha powders in a tea form. The way I've done it doesn't matter, but i find my self at home just doing calisthenics really light things ( no pull ups). I was curious to ask or curious for an answer. What would be the better investment to get some dumbbells or two kettle bells the same weight. One large kettlebell and one smaller one. What would benefit the most in your opinion. I am a still in University so just counting my pennies I suppose. What would benefit me the most and how soon should i start doing these pull ups