Bring your gun over to the NE side-by-side at Hausemann's Hidden Hollow, June 4,5 & 6. John will likely be there removing dents.
I'd leave it to someone like John Hosford. He did the exact thing to one of mine for something like $10 last year.
One false move and you could loosen your rib at the end. John probably does 25-30 guns a day there. Going to the shoot saves shipping too!
I will second the recommendation to send it to someone who knows how to fix a dent. It is not hard once you have learned the skill but if you care about the gun I would not use it as a learning platform. The cost of lifting a dent such as you describe is minimal. Best of luck.
Steve
Good advice, IMO.
Regards
Chuck