I'm worse at budgeting too; however, I really worked on this after my BPD diagnosis and when I suffered from money losses. I got to understand that spending too much tends to come with the illness.
Anyway, I followed many tips I got from the financial expert in the show "Till Debt Do Us Part." I started with a strict cash budget for a month (or you can do half a month if you prefer that) allotting for all the expenses we would need as a family (bills, allowances, groceries and other miscellaneous expenses). It was difficult at first but one gets the hang of it...I can now monitor the inflow of cash from the outflows (the expenses) and I really make sure that the inflow is higher than the outflow which would account for the savings.
Believe me, it worked wonders...I am slowly able to pay my debts (from my impulsivity in the past), have enough for our needs and even extras for regular leisures. The best pay off is the feeling of being able to do it...I feel proud for this accomplishment. I think I am wiser with money now. I have come a long way I guess given what I was in the past...I hope this works...You can do it...Try it...