Hey, welcome to the Church, the One True Faith! So happy you’re about to start RCIA in August!
As a newbie to the Church, I love your enthusiasm! So I’m about to give you some advice: Don’t buy anything just yet, because you may just find that you are attracted to the Mass on weekdays. If you were to buy a Sunday Missal, the weekday Masses wouldn’t be in it. For now, following along in the missalette that is probably in the pews already in your church will work just fine for Sundays.
There are a wide variety of published missals. You want to make sure you have the most current copy, which is the Roman Missal, 3rd revision, no matter what format you choose, unless, of course, you decided you want to assist at the Tridentine Mass (the Latin Mass,) in which case you’d need an entirely different Missal, if you wanted to buy a personal Missal for the Latin Mass, that is.)
I’d go to the bookstore and take a look at what they have to offer. There are all sorts of considerations, apart from what is actually in the text. For example:
I’ve already alluded to the fact that there is a daily missal and a Sunday missal.
Different editions come in different sizes of print, which may be a factor if you (like I) have presbyopia.
Some editions have prettier illustrations. If your meditation is stimulated by visual input you might want to think about that.
There’s also the matter of binding. A sewn binding lasts longer. The Mass doesn’t change all that much, although, being the organic re–presentation of Jesus’ sacrifice on Calvary, it has had some changes through the ages. Since Vatican II, which was in the early 1960’s, there have only been a couple of different translations. A missal is what they call in fashion an “investment piece.” The missal you buy today will most likely (barring another liturgical council, which doesn’t happen very often,) still be “current” the day you die (bound Missals have the Church and liturgical calendars in a chart that goes well into the 2040’s.) So it only pays to find something you really, really like and that will have some durability.
Other considerations: Hardcover, soft cover, or leather bound (obviously, the most expensive, but also the most beautiful and the most durable.) There is also the Magnificat magazine, which contains monthly daily Masses, and a lot of other resources, but which is disposable and requires a subscription, like any other magazine.
Go to other Catholic bookstores and online as well. I think this is one “shop till you drop” excursion that Our Lord would probably approve of.
Personally, if I were in your shoes, I’d go to the bookstore, take a look at what’s available, and, once in RCIA, drop extremely heavy-handed hints to my RCIA sponsor that I would ***so love to get ***such and such a missal! You might get extremely fortunate and score the missal of your dreams as a reception gift next Holy Saturday!