Jokes aside, if this is just a mock up of what you would like to put in your tank once you have it I would suggest removing the twigs, also I am not sure what wood that is but it does not look suitable to be kept in a fist tank.
I may be wrong but it doesn't look like bog wood so if you put it in the tank it is likely to disintegrate over a period of time. You can use the rocks and stones but I would give them a good soak and scrub in some hot water before you put them in your tank.
Post some pictures once you have the tank set up if you need any more help or advice.