(Social Media) Marketing Advice

I'm a founder, currently with just my 2 other co-founders in the team. We have gotten through the ideation phase, with the help of an accelerator and have been given a grant of $5000. We're two technical founders and one non-technical founder, so do not need to hire any devs for now and are close to releasing our MVP. We're mainly using our money at this point for subscriptions (notion, chatGPT, etc.). Now we want to start spending on ads and social media marketing, but we all suck at social media, so we found a tool to do it for us: https://www.kendal.ai/. Do you think it's a good idea for us to spend $99 on a subscription to this AI tool so it can handle our content for us? If not, how can we do it better/cheaper?