I have trouble sleeping. Will a mattress help me?

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Obviously, mattress will help you to get quality sleep. Research suggests that sleeping on a medium-firm mattress, especially one with adjustable firmness, promotes comfort, proper spinal alignment, and quality sleep. If body aches and pain are a concern for you, research also suggests that the surface you sleep on makes a difference in your comfort. The main thing is how you select the mattress, if you're not expert at that you should pick up the product of a good manufacturer like JLH bedding manufactures. Usually hotels use the high-quality mattresses, so you can get that quality from JLH. Here is their link:
https://www.jlhbedding.com/product/hotel-mattress