if jeff likes you enough and is your favorite click on the closet during the house tour he talks about it being a weapons closet progress and he'll invite mc, and Ben outside you meet ej then can chose between Jeff or Ben. (Jeff's room offer is after you meet everybody he wants to go in his room first you talk and he asks if Mc wants to learn how to use weapons they go outside for this and meet ej and the other scenes)
You have to refuse slender proxy for this route and accept Jeff's offer when he asks about showing you something cool in his room after meeting everybody.
Obviously I'm a jeff fan so if you need more help I can help
Ej I'm unfortunately stuck on I can't figure that out I only got slenders and Jeff's images