I hope I will be able to help

Hello.

Once again I would like to ask how to say something...
How would you say "I hope I will be able to help"?

My major-problem is the "I-hope"-part, because I do not understand how to say it. If I understand it correctly "I will be able to help" is "私は手伝うを出来る", but I am pretty sure it is wrong...

Please help me!

"I will be able to help" using the verb tetsudau would be:
- Watashi wa tetsudau koto ga dekimasu.

But I. Wonder what kind of "help" you are referring to, though. Are you going to see someone and literally give a helping hand to that person doing something? Or do you mean like listening to someone talk about their problem and you want to provide emotional support or help?

For hands-on help, I can suggest
- O-tetsudai shitai desu. (I want to assist/help you.)
- O-tetsudau dekitara ureshii desu. (I would be happy if I could help.)
For emotional help, I can suggest something like
- O-chikara ni naritai desu. (I want to be of help to you.)
- O-chikara ni naretara ureshii desu. (I would be happy if I could be of help.)

Thank you very much! I meant to help someone to do something.