Step 1 — Use Headphones
This is probably the biggest game changer.
Most beginner practice amps now include headphone outputs, which instantly makes practicing quieter and a lot less stressful. You can also use a cheap guitar headphone amp like I mentioned earlier if you want something even simpler and more portable.
Also, try to invest in a headset that feels comfortable. It doesn’t need to be expensive, but if you plan on practicing for long periods of time, your ears definitely won’t be very happy later if the headphones are uncomfortable.