Don't let the furries ruin the fun for you. There's a lot more to BT than the Clan Invasion.
Apologies in advance for the autism. You don't deserve it.
I know there's more to BattleTech than the clans, but here's the problem. I don't know any of it, and I'm not importing a bunch of out-of-print paperbacks from the states to get up to date on the fed com civil war, the succession wars, the jihad, the dark age, the word of Blake, and I'm sure many many others. I didn't grow up with MechWarrior 2, 3, and 4. I only came in later. My favourite Battletech games are Living Legends (sooooo good) and MechWarrior 5 (because it works and I can follow what is going on) even though fans hate those*.
To give two simple, single examples. I kept hearing about how awesome Dominic Payne is. My research said he appeared in Mech Warrior 3. I watched a long play of the game and he does nothing. He's just a tag along wing man who doesn't seem to have a personality. "He piloted an Atlus tho!" But even that makes no sense because it gets blown up.
I played MechWarrior 4 Mercenaries, and I didn't know who the factions were and why I should care. People talk as if being house Steiner or house Davion is like choosing a faction in New Vegas, but none of them are explained in the game itself. Me choosing the merc company that offers more money was supposedly a stupid scrub move because The Kell Hounds are THE merc company to join because it's made up of former clanners. What I did was like being given a choice to play any of the Justice League and choosing to play as Aquaman.
I dump this autism on you because not only am I ignorant of the lore, and getting up to speed is nearly impossible, especially as a brit coming in late. I know the surface level stuff, like Urban Mechs being a joke, but there's a lot I don't know. And from the material I have seen (like the cartoon) is either clan invasion, or a setting that people say sucks.
I could get around it and set it on some corner of the galaxy where local factions are clashing for one reason or another. But at that point, I could just side step the problems that come with MW as a game and use a unique setting.
*Living Legends doesn't have a mech lab, so it sucks, but to me that's part of the appeal. There's no problems with "pop tarts", "laser boats", and "ghost heat" like MWO players complain about. I also like that LL has tanks and planes, giving you options other than mech v mech and making battles more dynamic and gives you a cheap way to contribute if you fall behind in cash. For MW5 people complain about the economy, even though every mission they go all in on salvage shares instead of insurance and payout. They also complain about the lack of clan mechs or certain parts.