Please don't be so hard on yourself, and you absolutely don't have to fake it or force yourself to love Motherhood!
It is such a huge change, to go from independent woman, to the beck and call of a tiny human. I lost so much of my identity when I had my son, it was insanely difficult.
I HATED the baby stage (agree with PP I find people who love it total weirdos!) I enjoy it more and more as time goes by.
As PP have said, don't underestimate how hard lockdown is making this too - I spent most of my time out of the house when my DS (now 3) was that age.
Also second a schedule 100% - and stick to it! I've started doing one with lockdown 3 and it's made a huge difference.
Try and plan in some activities each day, and order a tuff tray so you can do some messy play (doesn't have to be really messy, but great for baking, painting, flour and oats etc - I only do messy play I can hoover up because I CBA with scrubbing the carpet etc) Our tuff tray is just a builders tray for £10.
Also plan in outdoor time if you can, I try and plan an hour outside each day (if it rains he gets wellies and a puddle suit on and we go puddle jumping, I've blocked out the 15 m stage so no idea if that's suitable!) But we go the park, go for a walk, play in the garden.
I use bath time as an activity in itself, can take a good hour with toys and bubbles.
Use the TV if you need to and he'll watch it.
Also, if it's affordable, maybe consider a climbing frame? We bought one for DS to try and stop him scaling the floor-ceiling cat tree
and he uses it loads even now (it's got a slide and stuff, it folds away neatly and flat when he isn't using it)
I'm rubbish at playing toys, I always say my hubby is the fun one.
Umm... I also introduced a toy rotation - I'm sure I read something that the more toys a child has available, the less they play as it's overwhelming.
So he has a load of toys in a box under the stairs, some in his bedroom (he rarely plays in there), and then toys in the playroom (our conservatory, it ain't as posh as it sounds!) I rotate the toys around every 2-3 months or so and that helps hugely - I'm sure it was around your sons age I started, as my DS didn't care for toys.
Also look very carefully at your MH, I had severe PNA after I had my son, and it ended up as PND. Call your GP if you're really struggling.
If all that is no use, put him in nursery and go back to work - my friend HATES being a mum and this is what it's taken for her to start re-claiming her MH.
Good luck
it'll feel like forever right now, but it is temporary.