Don't be afraid. Use LinkedIn to build relationships.
Easier said than done? Yup.
Really? Yup
Remember you're not on an interview here, you're not applying for a job and you have something as valuable to say as any of those 'influencers' do - maybe even more so.
Where to start? Find a post or article here and comment on it. If you see another person's comment there, connect with them - that's the start of building a relationship.
And, then, stay in touch from time to time. Building relationships are like planting a garden - without the mess.