Feeding will only come if you perfectly square away your husbandry. My first contact would be with the pet store you bought it from to make sure they were feeding frozen thawed. I would also ask if they have live feed as that might be required to get this to work. I question if they had them on f/t but if they did they also most likely had them in a small rack where they felt secure enough to eat. You are not in dire straights yet with the feeding issue and you have some time before you even need to start worrying but get your snake in the ideal conditions. Wait 5-7 days before you even look in on him/her then offer food.

Don't handle your snake for at least a week while you try and get them feeding after fixing their setup. That is the worst thing you can do to a snake getting used to surroundings.

You can do it with your current setup but you need clutter and small hides and if in a glass tank you must block off the sides and back. The more clutter the better to get them to feel safe and hidden.

You need to get a UTH and thermostat to regulate their under heat on the hot side right away, an overhead CHE isn't going to cut it alone. You also need to regulate that CHE as they can get well over 300 degrees and dry out an enclosure rapidly. If you are using aspen shavings you will need to eventually move away from those as they are horrible for retaining humidity. Go Eco Earth or Forest Floor from zoo med. Your pet shop should stock these. Either will work.

2 properly sized hides, UTH, thermostat, blocked off back and sides, clutter, do not handle, wait 5 days between feed attempts no exceptions, and above all else have patience.

Get your enclosure feeling secure, your heat and humidity under control and you will get your feeding happening.