Yes definitely get a thermostat. They are needed to not only keep you animals safe but to also keep the right temperature without having to mess with bulbs.
News paper as substrate is nice and easy but not very appealing to the eye. You can use a lot of different substrates and coconut is fine, but newspaper/paper towels are just a lot easier to clean.
Also I noticed you got a feeding tub. Now this is a controversial topic but I don't like feeding tubs. I think it actually stresses out the snake too much, and I think it is more likely to cause cage aggression (which is the opposite of the feeding tub theory).
Other than all that keep researching and asking questions.