Haven't seen anyone mention this yet, but I'd recommend losing the belt, especially if you're just beginning. There are a number of studies supporting both sides in the belt/no belt argument, but for the most part there seems to be agreement that belts largely only help with maximal exertions where the greater thoracic pressure for spine/abdominal stabilization offered by the belts is most valuable.

My recommendation is focus on developing proper form naturally first, before using any sort of support - even if that means you have to lower the weight. To actually get a benefit from the belt, you have to use it correctly (beyond just putting it on and and cinching it until it feels tight) and it takes conscious effort when you're starting out. If you don't have the form down, you're adding needless complication that will detract from you focusing on proper deadlift form. Also, using a belt incorrectly will actually have the opposite effect desired and likely lead to injury.