To begin with there is nothing hard, given that it lies under your area of interest.
Being a lawyer brings with itself long intense working hours, working with strict deadlines and also grappling with multiple cases at once.
But one thing to keep in mind is at the end of the day, working in the industry you love, all this stress and "working under pressure" will be all worth it.
Consequently, you have to find real lawyers to help you learn AFTER law school. This is getting more and more difficult as most lawyers don't have the money to spend/lose on training new recruits.
Don't begin by yourself; try to work at first where there are numerous lawyers to learn from. Ask around to find out who are the best lawyers (everyone will know), then volunteer to each of them to help (in return for getting to watch how they do it!)
In my first job with a firm of 40 lawyers, I found out three of them were the best. Each of the three was glad to have help. I did their scutwork and clerical work, which made them more productive and allowed me to observe and learn.
I think the hardest thing for me was the inherent bias in the legal education system. It is geared towards white people. It's not to say you can't overcome it, but it can be really challenging when professors and classmates don't see their own bias.
I would say be yourself and know how you learn the best. Be kind to yourself. Seek out community, and find the joy.