I'm not taking my divorce well
What difficulties are you facing in your divorce?
I doubt if I could do another relationship as good as the one before
It is normal to feel sad after a divorce. Your marriage was on the rocks so to speak for awhile so you really didn't do that good as you think. Trying again will be very good for you, to get more practice and better yourself will be beneficial for both partners.
I just do not know if I am ready for another relationship.
You'll bounce back in time, you seem like a good person at heart. You need to give it time and be patient, don't immediately jump into another rebound relationship. Keep an eye out for opportunities and you'll find that special someone.