Applying for a Language Course Visa after Opportunity Card Expiry

My Opportunity Card (Chancenkarte) will expire at the beginning of December 2025. Since I have not yet found a qualified job, I am planning to apply for a residence permit for a German language course for the next year in order to stay in Germany.

1. Is it possible to get a language course visa after my Opportunity Card expires?
2. Regarding the financial requirement: Is it acceptable to use my part-time job salary as proof of financial support? My salary is close to the required amount, and I can also provide additional funds from my bank account to cover the difference. Would this combination be sufficient?

Thank you very much for your assistance.