new to working out need help
i’m just starting out trying to get into fitness, i’m not fat or anything but not skinny tho, i have little muscle on my arms and some fat on my core where it’s not a beer belly/ dad bod but you also can’t see my abs, i really just need help with exercises i have dumbbells, a treadmill, and a bench at home i want to build a little muscle on my arms and chest area and really want to get my abs and obliques more defined, also ive heard that i shouldn’t do the same workout every day because i need to let my muscles rest idk if it’s true tho can anyone help me? like what exercises would be good o only know like pushups, crunches, sit-ups and planks