Yep, new strings always sound great 
Try to remember the sound you are hearing now: brighter , jangly. When the string sound starts to go dull or dead, it's time to change.
Re the .10s, no harm trying them. They will be somewhat easier to fret and easier to bend, deliberately or accidentally. They will have less volume. Flatpicking will be very different because the .10s have a more rubber-bandy feel. Some new players start with a lighter gauge like .10s until their calluses develop and then move up to a heavier gauge.
The .10s have less tension on them so they may slightly affect your action. I'm guessing the action might go a bit lower but it depends on the guitar. If you do get fret rattle raise the action with a shim under the saddle. Measure the action at the twelfth fret with an accurate ruler graduated in 64ths. Write down the measurement. Change strings. Measure the action again. Write down. Play. If you think the action needs to be tweaked, consult your written measurements to determine the amount to shim. If you want to raise the 12th fret action by 1/64, the shim needs to be double that or 1/32.
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2009 CA Cargo Raw, 2006 Collings OM-1 SS light build, 2004 Taylor 714ce, 2000 Taylor 310K, 1991 Martin HD-28, 1971 Martin 0-18, 1967 Guild F-30
2006 Ovation Legend 6756LX 12 string, 2004 Taylor 354ce 12 string, 1976 Guild G312-NT 12 string (dreadnaught shape)
1966 Martin T-15 tiple, Mele koa ukulele
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