Don’t know what to do (please help)

I started the season with Williams. I hired Schumacher (Seargant bye). The buildings are at low lvl and the car is weak. mick crashes cars all the time and in Canada I had to buy all the parts beyond the limit. I lack the finances to improve key buildings. I don't know whether to focus on the development of the car for next year or to ignore it and focus 100% on the buildings. help me because I totally don't know what to do