Matilda L wrote: When you go to the wine shop to look for red wines, you might try asking the salesperson for something "soft and rounded" rather than "sweet".
cheers,
Matilda
Very good advice, Ava.

Nicole, Matilda's onto something there. I'm sure it's not safe for me to generalize about white merlot since I've only tasted one, but if that one (a Beringer) was typical then white merlot tends to be lower acid and more off-dry than dry. Haven't tried the Barefoot Moscato, but suspect it's also on the sweet side (containing a bit more sugar than a true dry wine) and in combination those wines suggest that you'll probably find most red wines a bit too dry at first. Your greatest chance of success then lies with wines that are, as Matilda mentioned, soft and rounded, but also fruit-forward. Those are real wine terms that any good sales person in a real wine store would be able to use to steer you toward some good selections. Were I your clerk I'd be thinking pinot noir, for it's lighter body, and merlot for it's generally lower acid and tannin than many other red wines. Zinfandel (the original, red) could work out nicely too as they tend to categorically be fruit-forward wines and they're spicy, which may ring an echo with your liking for muscat, but these days they tend to run a bit higher in alcohol (15% plus sometimes) and you'd find anything over 14% too strong, I think.
True story: when I was young I only drank tea. But when I got into the working world, coffee ruled so I forced myself to learn to like it. At first, each cup needed two teaspoons of sugar, but once I got to where I actually liked the taste of coffee I started naturally liking less and less sugar. By the time a year had passed, I stopped adding sugar at all. Where I'm going with that is that the person who suggested you try cutting the red wine with something sweeter could be giving you good advice. But cranberry juice wouldn't be the right thing unless you like cranberry juice--some people find it bitter and as an additive it might not complement all wines. I might reccomend that you make a simple syrup--melt about a tablespoon of sugar in a cup of hot water, let it cool, store in a jar or bottle in the fridge. You could have to play around with ratios and add more or less sugar to that, but I'm thinking that a good starting place for a cutting brew of which a dollop would add sweetness and dilution of strength without inserting any distracting/masking flavors. Over time, like me and coffee, you should find yourself truly enjoying the real wine flavors and needing less and less intervention until you realize you don't want any at all. With cutting in mind, I would tend to add Zinfandel back to the list of grapes I'd reccomend to you, but "soft and rounded" zinfandels to be sure.