You either need to:
1. Spend time getting good at marketing (read books, do the work, get feedback).
2. Spend money for an agency or consultant to do it.
3. Spend equity and/or profit sharing for a partner to do it.
No marketing is not an option.
At its simplest, marketing is nothing more than:
1. Repeat exposure to branding and messaging over time to build familiarity
2. Direct response (in-person or online messaging designed to produce some type of response, right now)
3. Positioning: your 'lane', the unique space you ocupy in the market, relative to competitors.
Clarify your value proposition(s) first, and then you'll need to determine how to make a simple presentation about your product.
I use the word 'presentation' more broadly to encompass any type of communication piece about your product.
Tip - study advertorials. They force you to create editorial content that relates to your product that is more story or customer-driven, and is often far more effective than regular ads highlighting features or benefits.
You can then drive paid media PPC/CPM traffic to your advertorials, and then hit them up with direct response retargeting / remarketing ads after pixelling them.
Be prepared that no one will respond during the first interaction or touchpoint. It requires many touchpoints to develop trust and familiarity.
If you're going to spend on ads, try to 'capture' them somehow - into a FB group, email list, etc where you can get in front of them for free the next time.
So, make friends with the concept of repeat exposure and advertorials, and get busy. Good luck!