I have a felony from 2011, sentence ended in 2016 would I be to able to travel to the U.K?

I tried googling and found conflicting answer's. One says a sentence over 12 months is a lifetime ban, other says a sentence between 12 months and 4 years if the sentence is more than ten years since finished I can go.
Anyone on here had experience had with this?

For more information if I did go it would be a couple week's max.

I have two felony's; a reckless aggravated assault, and schedule six intent to resale, it was weed. I have various other misdemeanors publix intoxication, d.u.i

I got charged with them Jan 2011, deferred sentnece on probation of 4 years that I failed where my sentence was then changed to Guilty in May 2016, sentence was finished around August 2018 I believe.

I've been in trouble since may 2016 of any kind.

I've never left the country, am American if it isn't obvious. I don't have a passport yet not sure if i can get one of them either.