Other Ways to Say “Oh”/”I see”/”I understand”

Hi, I've recently been doing speaking practice as part of a language exchange program, but when listening to other people I often find myself exhausting my reservoir of response words to their statements.

I know ”へえー” and ”そうですか?”, but I've never really used "なるほど" bc I'm not sure if it sounds too anime-ish/informal for people I'm just getting to know I do say "分かりました" on occasion but it feels more niche and more for when they're directly telling me something rather than just saying "that food was good" or stuff.

Are there any other words I could use to show active listening/engagement, and/or are my interpretations for some of the words incorrect? I'd love to know!

Thanks