If you've gotten nothing but unanimous praise then I'd wager your friends are being polite not honest

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What industry are you targeting with your ar/vr solution? And what is it? I would go hard on LinkedIn and not bother with anything else for now, otherwise the task will feel too enormous. You need to start creating organic content on your personal profiles as well as the company profile. Your personal profiles will be a little easier to grow. Create content around thought leadership, authority, credibility, industry insights, comment on other people’s posts from your industry for bigger reach, giveaway guides and tips, create video content around your AR course. For the brand page, you can create whitepapers, webinars, case studies, credibility (testimonial posts), behind the scenes, team photos, industry guides. Your job right now is to create brand trust and credibility around your startup and yourself, so people feel more at ease engaging with your solution. Depending on your target industry, you could potentially run AR ads on Meta to show your solution or promote your AR course but this really depends what and who you’re selling this to. More on reddit.com

Sprout and Hootsuite are good options, but for analytics + social listening, you will pay more than a thousand $ per month. Buffer is publishing focused listening would be compromised.

Suggesting some decent alternatives.
Statusbrew - Simple enough to use with social listening. Pricing is also suitable for startups and SMBs
Agorapulse - Clean UI with the features you have mentioned above

There are more like Sprinklr or Brandwatch, but they will drain your budget.

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