This is a very valid point, it is very important for a newbie to learn the act of buying consistently and not the habit of holding back money and waiting for the dip before buying, it shows no consistency and the market needs consistent growth, holding back will only reduce the confidence of an investor and as a newbie you need to be confident. In as much as you are buying consistently and aggressively, always make sure that there’s a reserve or emergency funds available.
Confidence is hard to find with the newbies but it starts from there.
But as you've given that warning at the last sentence.
That's what stopping a lot from buying when they have no available emergency funds and as well as the needs, they're putting that up first.