Yes the green ones ripen to red, orange, or yellow eventually depending on variety. It sounds like you may have encountered sunscald on your last attempt which can cause the fruit to rot on the vine. Providing some shade from west of the plants in the heat of the day may help to protect from sunscald.

Assuming you are talking about bell peppers, You would need to be sure that you have chosen a green to red variety. Purple to red and white to red will also work. Just make sure the ripe color is red. There are yellow, orange, even green when ripe varieties. There are varieties that ripen more rapidly. Many of those varieties will list both green stage and ripe stage days to maturity. Usually about two weeks difference. Getting ripe peppers does require more care as they really com under attack when ripening. Sweet peppers like Marconi or bull's horn types are much easier to to ripe peppers.

If you want HOT red peppers - chile peppers - they will ripen fast enough to not rot.

2 very popular sweet pepper varieties, that ripen red, are Ace and Carmen. Both are hybrids that are on the early side and high-yielding. Ace is a bell variety and Carmen is a bull's horn variety.

Some varieties are better for turning red than others. It should say in the description for the seed. Weather is a factor too. I had jalapeños that turned red last year but very few bells that turned before rotting.

Yes green ones will turn Red, if they are the right variety. Greens also turn Orange, Yellow and Chocolate (brown) There are also Purples that turn Red, and Whites that turn Red too. Here was some bell peppers we had for sale last fall.