Here you go...just got divorced. Same situation.
1. Block him from texting
2. Set up specific times for you guys to see the kids. Avoid seeing eachother-use dayrcare or parents at decoys.
3. Be specific. Tell him you only want him to call if there is an issuse with a child or need to make other arrangments with parenting time. If you work the same hours, this can be easily done.
4. Ignore him. Eventually....he'll get the point. I'm serious about that. Be the bigger person.
Remember: You are on your own now. You are your own boss, set your own time and answer to know one. You need to be strong and set ground rules. It took almost a year to get over the nagging ex. Also, don't worry about him sending info to friends or family. They are YOUR friends and YOUR family. You are only trying to provide the best situation for your kids. They love you and will support you.
If you can afford it, get a lawyer. If not, let your lawyer do the talking.
Good luck to you-