How do I prepare for a ABC trek?

My last trek was Gosaikunda back in 2019 and I am not as active as I was in 2019.
But I miss the mountains. It's been so long.

I am from KTM. So is flight a good option? (I don't feel safe with flights anymore tho)
Should I take the bus?

Is there any home training that you guys would recommend I do to prevent injuries.
I was thining of starting to weighted runs.
I want to be able to complete the trek with no issue and complete in average time of 5 - 6 day.

What's a good time to go for the trek?
Is Novemeber to December a good time?

I am by myself at the moment. How do I find trekking partners?
I noticed there were some facebook groups to find people to go with.

And say I want a porter to help with the bag.
How do I find them?
How much should I compensate him for it? I want to pay him nicely.

What are the good hotels to book? Any hotels that you guys stayed in would be perfect.
Thank you so much.

Any insights would be greatly appreciated.
Like if you did the trek again, what things would you do diffrently?