If you are new, and not experienced with outbound sales then I would not recommend reaching out to any companies. I would also edit your post with the domain to something like c a r t o o n b r o s / com so it doesn't show in searches.
A company that is interested in this domain will go to a registrar and type it in, or type the url directly. The best method is to set a buy now price on the landing page and wait patiently.
If you reach out to an end user you already are at a disadvantage leverage-wise. It is better to wait for them to come to you and you have the upper hand in negotiating. Or, if you domain is priced well, they will hit the buy now button.
I would price this one at $4995 and cross-list it on Afternic, Sedo, etc.
It may sell in a month, or it may take 10 years. It's like fishing, set it and forget it.
I'd like to add, as others have mentioned it's not a top-tier domain. It's only registered on a single extension (.com) and even Cartoon Bro .com is available still. So not much demand. I see there are some Google results for that term so those are potential buyers.
However, this is a name I would have passed on personally.
That said, it won't hurt to put a buy now price and see if it sells in a year, if not you can always drop it. Best of luck!