If you're fully vaxxed and otherwise healthy, you should be fine.
The vaccines do two things to your immune system. First, they cause your immune system to generate plenty of antibodies. These will often prevent infection, but they don't stay at high levels for long. Second, they activate the part of the immune system that uses b-cells and t-cells. This 'cellular' immune system only kicks in once you are infected, but it will shorten the length of the infection and keep it milder. The cellular immune system has a much longer "memory" than anti-bodies, and is less specific to particular variants.
P.S. I only read the heading & abstract of this paper, but it's got good news:
T cells stand strong against Omicron
... T cells recognized Omicron just as effectively as other VOCs, suggesting that vaccinated individuals maintain T cell immunity, which could provide protection in the absence of neutralizing antibodies, limiting severe disease.
https://www.science.org/doi/10.1126/sciimmunol.abo2202VOC = variant of concern
