Every one is a little different, you have to find what works for you through trial and error such is life!! Personally what helped me is breaking my sentences up more like right when I felt like I’d get stuck I will swallow and then continue the sentence, or chuckle my throat once or twice but making it look very natural. Also things like hand movements while I speak to add enthusiasm helps me to get out words easier, finally not giving too much eye contact helps too since eye contact makes me anxious, but then again not too little coz it’s rude lol so add it all together and make it work because it’s possible!