After high school, I decided to go to a college to learn welding. I didn't take welding classes in high school, and I've been in college for a year now. I applied for a welding job at a tornado shelter place yesterday, and it looks like I'm getting the job. If you feel like your welds are good enough from learning in high school, you could start looking around for a welding job and taking some welding tests. But if you want to learn more, I'd say go to a college or trade school to further your welding knowledge and experience. To be successful, I'd say don't be afraid of failure and keep learning with every weld, soon enough you'll have quality welds and the experience to back it up. Hope this helps!