High-Quality Audio Restoration

Hi I recorded my daughter's recital and it is a 3-minute video performance of her singing a song. For the first time I used an external mic and I got horrible results and I can't share this video with a family because they can't enjoy the performance because of horrible sound. The sound quality is poor and uneven, some areas are high volume some not, there is an echo feedback and hissing or screeching sounds. The song itself is very expressive, so it will naturally have low and high pitch but I would love to have the pleasant experience listening to it.

Key issues to address:
- Volume inconsistencies
- Background hissing and screeching noise
- would love to hear significant improvement.

Ideal skills and experience:
- Professional audio editing
- Experience with noise reduction
- Ability to balance and enhance audio for a polished final product

Please provide samples of similar work.