One of the easiest ways to get people to engage with you on Facebook or Instagram is by using a quote deck.
There's one thing that I recommend you do before using these quotes. I'd upload the images into canva and put your web address on the bottom of the image.
The goal of the quotes is that you want them to be shared. When you include your web address, you're also helping to share your website. Score!
Once you have loaded the quotes into the platform of choice, you're also going to want to write something clever to go along with the image. You can experiment with this, but I have found that it works better when you include a little personality with the quote.
You can load them into a 3rd party schedulers like Meet Edgar, CoSchedule or Hootsuite, or you can schedule them in the native platform.