If your business has the budget to start advertising immediately and you are able to maintain that budget for 2-3 months then I would say you should look into advertising.
Especially if you can afford a digital advertising partner that knows what they are doing.
Each industry is different and the cost of advertising varies by industry and location.
But advertising should not be looked at as an experiment but as a monthly investment that you are not expecting to stop any time soon.
Google recommends advertising for a minimum of 3 months to start seeing consistent results.
This is why it's not recommended to most new businesses to start advertising right out of the gate. It is important to grow your business organically first.