Well, I think the most important thing for a cultivation novel is the Dao.
If you want to get philosophical, the Dao can be pretty complicated, but it roughly means the Truth or the Path.
Think of Naruto's ninja path, it's something you hold dear and follow, something that shaped your life either because you like it or because you value it.
In effect, a cultivator gains enlightenment through the Dao, but that can be just about anything, from eating, crafting pills, fighting, poison, using a sword, growing a farm, or even more exotic or funny things like seeing the world, virginity, the growth of a tree, "the grind", having a harem, making dolls.
My suggestion is, to pick something interesting or funny to you and build your MC's path around that concept. Also, try to have your cultivation levels organized and get more exoteric the higher your MC reaches.
It won't affect your MC too much at lower levels, but you can have things related to it from the beginning and have them shape your MC's path as he grows in power, making for an even better story.
I once read a novel where the MC faced someone with a very weak Dao, he cultivated by observing things and putting himself in other shoes.
The interesting thing is that the enemy developed a technique that did just that to anyone he was fighting, so the MC had to fight seeing things from the Enemy's perspective, not his own, and it messed up with his coordination, delaying his every action just enough to give the enemy an advantage. Worse, whenever he sent the enemy flying, he'd get the disorientation the enemy felt, his field of view would spin and he could even lose sight of himself.
That was a fun, interesting read that truly gave me the feeling of facing someone on a cultivation path.
So, really, my greatest suggestion is that you choose your Mc's Dao and be creative about what it means. Yes, sword cultivation is probably the strongest in a fight, and it's the most straightforward path, but you can get creative even there, with the sword cutting through ethereal things and having interesting effects and, with enough creativity, knitting cultivation can be very entertaining.
Knit dolls that fight for you, sew your enemy eyes shut mid-battle, control their movements, sew enemies together by the arm or back to back... at higher levels, sew concepts together to craft artifacts, stitch portal close to deny your enemies access to some cultivation heaven or block teleportation, the possibilities are endless.
You can also have broader paths, like being righteous, or being an asshole, caring about others or only about those close to you, or even taking everything and becoming a demonic cultivator.