Think of the eagle as a fun little budget sports car-Its responsive, manouverable and has an excellent field of view. Its also pretty damn fast, but not the fastest and it lacks the brute strength, raw power and space of its bigger brothers. Overall, its a very fun ship to fly. You've basically got three options
1. trade it in for a different ship(note i didnt say better, better depends on your playstyle and short and long term goals)
2. Ditch the scanners or shields or something and use it as a faster and longer range sidewinder. I cant remember exactly what you have to ditch to install extra cargo space, think it might be shields.
3. Kit it out with an interdictor drive and use it as a beginners bounty hunter/pirate ship. Upgraded to make use of its three hardpoints it can quite a punch and with skill and FA off you can take out much bigger and tougher ships. Just don't expect to engage an anaconda and win unless you've got some experience turret dodging. The great thing about using it this way is that it is very cheap to rebuy so its a good way to wet your feet in these roles. Just always remember to have enough money to rebuy it! If you don't have enough money to rebuy at least twice, then high tail it back to your sidey and get trading. Once its gone, its gone!
personally I've gone for option 3. Even when I can upgrade it, I think I'll keep it because its just a joy to fly. Its also not bad for basic exploration if you strip it out and upgrade its FSD a little.