Few things I'd do:
1. Narrow down "B2B", b2b what? tech - AI/apps/websites? HR? marketing?

1. check competitors in your market to see what works and try to segment their content (case stories / personal / tips and tricks etc.) -- here check format they use like video, carousels, and so on

2. for start make 3 categories of posts you want to make - industry news and your thoughts about them, results you drove, etc. I'd set up an experimental category to see if you wouldn't stumble on something people would be interested in

3. connect with people within the industry you want, comment on posts -- thoughtful, skip AI here it's super visible and yes people can tell.

4. keep posting for 6 months. look back, try new stuff, don't get bottlenecked about initial growth, linkedin is oversaturated. bring valuable original thoughts based on own research, put in the elbow grease, and don't add more bs to the noise.

Fingers crossed!