Use of tenses

Hello,
I was struggling with this sentence for a while, mainly because I'm not sure that the tenses are correct. You help would be greatly appreciated. Please also let me know if the sentence makes sense to you. Thank you and here it goes:

"Many people look back at their lives and wish that someone would have explained what lies ahead while they were still in the beginning of their journey, so that those important, life-impacting decisions could be made with all the wisdom they deserved. (or deserve?)