Help with the 'tl' cluster and saltillo pronunciation

I've been recording myself reading out loud to fix my accent, but the 'tl' sound still feels like I'm tripping over my own tongue, and I’m never quite sure if I’m hitting the saltillo (the glottal stop) correctly. It’s hard to tell if I’m actually making the right sound or if my ears are playing tricks on me because I haven't heard enough native Nahuatl speakers yet. Does anyone have a good guide for these specific, tricky phonetic clusters?