Thailand Self Tour

I'm planning to make a travel trip with my mother. We have a vacation before The Spring Festival. We will go to Thailand by ourselves.
We will spend two days to travel in Bangkok. I don't know if the food is delcious in Baiyoke Sky Hotel Restaurant，but I think I will like its pretty scenery. After we visited visiting The Grand Palace, we will plane flight to Phuket Island. I booked a hotel near the beach. I like the sea, I hope I can sit on the yellow beach golden sand and appreciate enjoy beauty the beautiful views landscape/scenery.
If I should to take part in the diving activity can go diving, maybe it is a little dangerous.
After I bought the plane tickets, I've find found there are so many problems to solve, there are so many choices to descion decide.We all don't know the Thai langurage language, so I have to practice my English. I haven't spoken English for a long time.