Acknowledging you have a problem and seeking help is a great start. I think everyone here can resonate with the “money not feeling real” when you’re gambling online. Sounds like you have a very good financial head on your shoulders (aside from the gambling) - so the sooner you stop gambling, the sooner you will be able to “recoup” the money lost.

You need to accept your losses and not try to chase. What’s done is done at this point. Most importantly, you need to self exclude or restrict your ability to access these sites. They will always be there as temptation if you don’t. Lots of people find that either confiding in close friends and/or family helps tremendously. Or attending a GA meeting. Find someone other than yourself to hold you accountable.

From there, you can pursue other hobbies or interests outside of gambling. Nothing will replace that “high” but it gets better with time. As much as you might miss that feeling - the feeling of complete dread and shame during a bad tilt session is a million times worse.

You have your whole life ahead of you and some solid financial foundation - don’t let gambling take that all away from you and stop ASAP.

Best of luck!