Fees is definitely high for CA course but you have 2 main options – spread the payments over all years of articleship or take an education loan. Articleship basically reduces the cost burden since you get a stipend during that time.

You have lots of options after 12th. You can go for undergraduate programs in engineering, medicine, commerce, humanities etc. It all depends on your interests and skills.

Accountancy is all about practice. Do lots of problems and understand the concepts behind them. Focus on the basics and numerical weightage in the paper. Don’t stress yourself, you will do great!