Cooking at home and stop eating out

I have completed my frist week in phuket (Bangtao) out of my 7 week program with 6 more weeks to go and my expense on eating at a restaurant has rounded upto about 2500 a week (trying to keep 300 baht a day on average). I eat 4 times a day (breakfast, lunch, 5 pm and dinner). Breakfast I’ve been making on my own and was wondering if i make all meals by myself would i be able to save more or not. I usually eat 60-80 baht per meal but sometimes more.
Would be great to have some advise from experienced people since it’s my first time away from home, alone.
Thankyou…

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