Congratulations on your first citrus tree! I bought a Meyer Lemon myself in July/August and your fruit still have a ways to go. Lemons can take anywhere from 6-10 months to ripen, so don't let the size make you prematurely expectant. They also tend to flower multiple times throughout the year (as opposed to one main flowering like some other citrus) so it's quite normal to have fruit on the tree while its flowering again. As long as its being well fed with fertilizer the first set of lemons should still ripen fine, and citrus will usually drop what new fruits the trees are enable to support anyway.

Mine had one the size of a pea on it when I bought it and that is now about the size of a normal lemon but it has also flowered a couple weeks ago and set more fruit, and is flowering again now lol. I really like this variety.

Be patient. Your three fruits aren't that big for Meyer lemons, which can get as big as good sized oranges depending on your tree and growing conditions. Our trees have their main bloom in late March or April, and then keep blooming throughout the year. The main crop starts coloring up in November usually. This year they started in October, maybe because of the drought here in CA. We jump the gun and start using the barely yellow fruit too soon every year, but if we wait, they get bigger and juicier. They're fabulous now, but there are also immature fruits that set later. Our trees are outdoors.

algeasea

you have a Myers indoors ?

i always though citrus needed a lot of sun ?

i have 2 myers (small). i just put one in the ground in full sun, the other i plan on planting out soon.

It would be great to put the other in a shady location. i have an area that gets 2-3 hours of direct sun everyday, but didnt want to plant a fruit tree there ?

the rest of my yard is full (LOL)

My Meyer lemon trees are outdoors. I've never grown citrus indoors.

Yes my Meyer lemon tree is currently indoors. It spent the warmer summer months outdoor and in early fall I bought it indoors. It sits near a window that receives a lot of sun during the day.

Citrus fruit need cool nights (below 55 F) to change color. Mine are planted in the ground outside (N. California) and they turned color from green to yellow in November, when nights became cooler. You may try to put the tree in a cooler room. Also note that Meyer lemons change fruit color from yellow to light orange when fully ripe.