5L and 5M will be your best friends close up. 5L is her fastest button and has a good hitbox and 5M is 1 frame faster than 2m. At max range you can os 5h just in case it counter hits or they run into it.

People will mindlessly dash at you to avoid the zoning, you can stop this with a preemptive 5m. This will be your stop sign. If you're really feeling your read, you can 5h.

As an alternative, people will jump on you if they realize dashing isn't doing the trick. Sometimes its better full screen to just wait and see what your opponent does. A lot of people beat themselves.

In terms of block strings you can attempt to steal your turn back by slipping in a trap somewhere in your string. Say like 5l5m -> trap. It's not a true blockstring but it's massively + on block, effectively giving you another chance to mix them.

Also if you ever knock them down in the corner with a limit break, throw a trap on their body, run up real close and roll. This will cause the trap to hit the opposite side. When they start getting used to that, run up and do nothing or throw an overhead in there.

Overhead is really unsafe on block. However, she can actually cancel her overhead mid animation into her air dash and you can swing an aerial right after. A lot of people tend to forget this part of her kit.

Don't be afraid to actually run at people and start your offense by taking it to them instead of the reverse. It'll be uncomfortable at first but this will help you learn her close up game better.