That is really nice advice for the newbies. Upvoting on 100 posts in one day or in how many days? You haven't specified that.

Making a good quality and relevant comment is really necessary. In earlier periods, my earnings from comments were more than that of my post.

Following other authors is required but try to follow them whose posting matches your niches so that you can make good comments.

Last but not the least, making a quality post is a first and foremost prerequisite.

Have a nice time there.

In this context, I think my latest post might be helpful for newbies.
Tips: How to give a fractional upvote when your SP is below 500?