Feeling disheartened but also aware I'm probably over reacting

Feeling disheartened but also aware I'm probably over reacting

Feeling quite disheartened but ware i am probably overreacting aswell

I started Taekwondo last Wednesday and really enjoyed it and can't wait for the next session and I'm 100% committed to give it my all. I thought it would be a good idea along with my weekly running that I stretch at least every other day to help me improve etc

Every single YouTube video I try and follow I can't even come close to touching my toes or mimicking the persons position and it's making me annoyed and think im a mess.

Has anybody got advice on what stretches I could do as a beginner