First off, I'm a 100% stock investor.. So given that..
For me, I started investing back in 2000, with around $700, over time that's built to a fairly large sum, and over that time, I've seen my share of market pullbacks. But the thing is, I've also seen my share of market recoveries.
So, when I saw my first pullbacks, it was small amounts of money, so emotionally, it was easier to handle. And now that the pullbacks 'temporarily' cost me much more more money, because I have seen these in the past, they are easy to intellectually handle them.
In summary, I think its very good to start off with small 100% stock investments and watch what happens over time. So yes, I think the OP's plan is a good one.
In contrast, when I hear about people who have had their (large) investments outside of shares, and want to change their investments to be 100% in stocks - I'm always in two minds.. intellectually, I think that's best, but if people do such a change, and then there's a drop, there's a (large) risk, that they'll emotionally pull all their money out of stocks, and swear off it for a very long time (forever), thinking that its some sort of rigged form of gambling.