Eating less and more meals will not burden the stomach.
Eating fruits and vegetables properly can provide trace elements to the body, and cellulose can help digestion and absorption of nutrients.
Eat some sweets, such as chocolate, cakes, biscuits, etc. Sweets are useful, but you can't eat too much.
The stomach is bad, and the dinner can be pasta.
/kloc-it is very important to sleep before 0/2 o'clock and ensure a good sleep.
Keep an optimistic attitude.
I hope I can help you and wish you success in gaining weight as soon as possible.