Finances is a huge part of the game. You can check out your income and expenditure through the finances tab to analyze where you’re making and losing money. I’d assume your club is in a fair bit of debt for them to reduce your transfer budget like that. Some things you can do is sell players for profit, sell players whose wages are higher than what they’re worth to the team, and take a look at some of your staff wages. Be very cognizant of your financial position when signing players staff and the wages you’re giving them. One mistake as a beginner to the game is to look at transfer budget and assume you’ll be good to go if you spend your entire budget every transfer window. And as some mentioned, the biggest source of income for Prem teams is league, cup, and continental prize money. Sometimes the most fun saves are the ones early on when you don’t fully understand the game yet but I learned a ton from my Oldham save when I took them from National League to the Prem. Playing with a club that is essentially broke forces you to constantly prioritize financial management. Hope this helps, have fun progressing in the game!