1. It's not really insurance
While many refer to "SR22 insurance" an SR22 is actually just a certificate your auto insurer files with the state who requires it to vouch for you. Basically, it verifies you have the proper coverage. You will only need SR22 if a judge convicted of certain offenses, failed to pay judgments, driven or owned a vehicle involved in an accident not already insured.
2. It's does not cost as much as you think
If you are required to carry an SR22, you might be able to just add it to your policy with a small fee.
However if you don't have insurance or your current insurance company does not offer an SR22 filing then you will need to get a company that can.
3. It won't be forever
In most cases, 3 years from the date you're convicted give or take, At that point, call your insurance agent and ask to have the SR22 removed from your policy.
Generally three years is also how long it takes to clear your driving record. So, any violations that triggered your needing an SR22 have cleared from your record, too.
In the meantime, keep your head up, know we have all been there, and remember that, in time, this will become "that one time when..." kind of story.