I shouldn't worry about it - it is not where you are at the moment but where you are heading to that counts
Even if you can't solve a specific problem today, then concentrate on the problems you can solve and slowly work your way up. Eventually you will have picked up the knowledge and skills required to solve more complex problems and will have learnt a huge amount on the way.
Generally speaking, C is quite an unfriendly language. You might want to use a more supportive language such as Java or PHP. Feel free to post any code/questions onto here and we will do our best to advise