Some people also play bids of opponents suits as NATURAL when they've bid two (or more sometimes) suit. For example, as in your bidding, 2
♣ would be natural, whatever strength you like for an overcall at the two level, and 5+ clubs. 2
♥ would be natural, but 6+ cards, usually.
Actually, the funny thing is, the treatment I mentioned above is "standard" in the US (ie, it's what is in Standard American) though I don't have any clue how standard it is in most pairs' bidding systems.
I think a rule to remember when wanting to make marginal bids (eg, open or overcall with minimums) is "where are your points?" If your points are in your long suits, your hand is better for competing than if they're in short suits. Another (very related) question is "how well does this bid describe my hand". If you don't really have the shape for your bid, nor the values, you're either going to mislead partner, or greatly help the opponents. And you don't even have the excuse of, "my suit looked so great, I wanted to tell you about it"!