I Need Help Finding a Member Management software

Hi, has anyone had any experience finding a good member management software? I work for a small nonprofit college sports association and have no clue where to start.

We are looking for something that will allow for us to use email and text messaging to reach our members all over the country. We also are looking to start an alumni data base and donor data base. It would be great if it could track forms filled out and we could filter by division. Also payment and donations would be awesome.

There are so many different options, any help or leads would be super helpful.