Snakes that "squeak" may have the beginning of a respiratory infection: his immune system is already stressed from being re-homed, so it's very important
for him to have the right temperatures available with the right hides to utilize them. Snakes typically choose to hide rather than the right temperature if not
offered adequate hides.
Which of those hides is on the warm side? If you need the lamp to keep his temps warm enough, then what happens at night? (you should be using either a
red or black bulb, or a CHE (ceramic heat emitter- ie. has no light, just gives off heat).
For the moment, stop worrying about yourself (getting bit) and keep him healthy. A slight RI may disappear if a snake has the right temps. (maybe 1 or 2* higher
than normal) AND is allowed to rest (like you would with a bad cold!). You are very lucky he ate...now let him "settle in" & rest.
Snake bites from harmless snakes are no big deal in terms of damage...most other pets do FAR worse & hurt more. Snake teeth are tiny, bites will startle you
but their teeth are like rows of very tiny pins that you'll feel but that rarely even cause infection. And if you learn to properly show your snake he has nothing to
fear from you, you many never even get bit. Really up to you...to take your time with him. But that's for later...right now his health & feeding is JOB #1.
IF his RI symptoms get worse, you'll need to take him for medication from a reptile specialist veterinarian...better to prevent, right?