The wedding toasts can be at any time of your choosing, but generally the toasts are done either before or after the meal. But feel free to do whatever suits you - even if you feel you would like people to get up and make toasts during the meal.
If the food has been prepared and your guests are hungry and waiting, then it might be wise to leave the toasts until after the main course as often people can get a bit agitated if they are waiting for their food and it is being delayed by somebody who is talking.
Sometimes even the best laid plans change in the course of the day, and when that happens you really just need to go with the flow and enjoy the occasion without getting stressed.
If you have any specific people you would like to toast yourself this should also be listed in your wedding plans to make sure that you don't forget on the day and it is a wise decision to keep a little note with you with reminders of particular aspects such as this that you don't want to miss out on doing.
You might also like to consider nominating a person as toastmaster who can control the toasts and the people talking and ensure that the whole reception process runs smoothly just as a conductor would do with an orchestra.
Ask friends or family to see if anybody would like the job as toastmaster taking into account the fact that most people will generally prefer not to speak in front of a crowd.
If you are unable to get someone you know to act as toastmaster then you might need to hire a professional for the job. It will cost more money but at least you know it will be a polished performance and they usually know how to work the crowd if you give them sufficient input beforehand.
Toasts: The Perfect Words to Celebrate Every Occasion134 Wedding Toast Speeches - 57 Traditional Wedding Toast Speeches & 77 Funny Wedding Toast Speeches - Bundle of 2 Books: Wedding PlanningWedding ToastsWedding Toasts Made Easy!: The Complete GuideI'd Like To Say A Few Words: How To Deliver The Perfect Wedding Speech (Wedding Speeches, Wedding Speeches and Toasts, Wedding Toast Guide)The Knot Guide to Wedding Vows and Traditions [Revised Edition]: Readings, Rituals, Music, Dances, and ToastsThe Knot Little Books of Big Wedding Ideas: Cakes; Bouquets & Centerpieces; Vows & Toasts; and DetailsDiane Warner's Complete Book of Wedding Toasts: Hundreds of Ways to SayHow To Give A Christian Wedding ToastWedding Toast Speeches: Bride, Groom, Bridesmaids, Best man, Grand parents, parents, friends: Traditional Wedding Toast (Wedding Plans)