You can do below courses in Aeronautical engineering

1- Diploma course - You can do after your 10th or 12th class

2- B.E/B.Tech course - It is a UG course which you can do after completing your 12th class

3- M.E/M.Teh course - It is a PG course which you can do after completing your UG degree.

4- Doctoral degree courses - You can do after completing your PG.

Good Luck!!