The First Rain

Happy Review Day!! So, first things first, this poem is very good, though it does need a bit of improving.
Firstly, your rhyme scheme here has a loooooot of rhyming in it. So, in poetry, the first thought a non-author would form when asked 'What is a poem?' would normally be 'Something that rhymes.' See here, you did just that. Lots of rhyming, in fact, on every line! But poetry doesn't always have to rhyme every line, or at all! One of the main things to look into when proofreading your work is the rhyme scheme. Ask yourself 'Do these lines make a nice flow in the work?' So when you rhyme every line, without a more complex rhyme scheme, you do sound just a bit desperate. Believe me, I've done it, but when you rhyme every line, this limits the words you can use to describe our subject, and therefore often doesn't help the poem make much sense.
"They are in a sign,
And they are fine,
And so they combine."
This stanza doesn't make much sense, especially the 'sign' part, so if you rhymed less, with a set rhyme scheme, your poem may make much more sense. Rhyming every line is hard, and you must have put a lot of effort in this, so good job! It just sometimes makes a bit more sense to work less hard, and get a better product in the bargain.
Secondly, to move on from one thought to another, you say 'And' a lot. In general literature, we want to avoid starting lines, stanzas, and sentences with the word 'And', because it is a bit messy in combining thoughts. A little like glue, it kind of sticks two thoughts together that could be incorporated together way nicer if you took a different route in putting them together. I hope that made sens... but anyways! Try to avoid using 'and' a whole lot.
Okay, so that's a good segway to my third thought, which is stanzas. Stanzas are really, really helpful in poetry. They seamlessly incorporate multiple thoughts into a nice poem in a way excessive 'And's can't really do. I know the formatting on YWS kind of sucks in the stanza department, so no one will judge you if you put a period in the space where the stanza space is supposed to go. I do it, and we all know the formatting problem.
Fourthly, you used a lot of commas in this poem. Every line does not need to have some sort of punctuation at the end, so if one line kind of seeps into another nicely, don't put a comma there! It ruins the flow of the poem, making it very choppy and harder to read and think about. Remember, one of the ultimate goals of writing is to make something nice for the reader to read, and you don't want to make that hard on them. Excessive commas and punctuation take away the flow of a poem making it really hard for the reader to concentrate on what you, the author, are trying to tell them through your literature. Tip: stanzas are good ways of transitioning from one thought to another, so after a period in a poem, make a new stanza.
Fifthly, the line 'After the first, the next follow,' could be a.) a good place to put a period instead of that last comma and create a stanza and b.) two lines, rather than one. The poem would work better with two lines there opposed to one. Two lines are better than one!
Aaaaaand I think that's it! I hope you find this review helpful, I tried to make it so. This poem has awesome potential, and is still great as it is! Keep writing, and happy Review Day!
~racket

Hiii tiny here!

Just adding to what my fellow YWSers have said.

After the first, the next follow,

The rain makes the clouds wallow,

There was a bit of sorrow,

But the rain continues to follow.

And that was the first rain.

Hello thepolarbearleague! This is Sylar here for a short review on this lovely review day. Go team Blue Moon even though we're still losing by like 2,000 points!

Anways, let's get onto the reviewing. Altogether, I thought this was a really well done poem. But, I thought there were some errors:

It seems as if they will sigh,

And they are fine,

There was a bit of sorrow,

This is a good poem.

This is a good poem.

Hi! I am here to review.

"And there they flow low in the sky."- Clouds don't really flow, I think you meant float.

"There was a bit of sorrow,"- With the line before it, I would revise this to say, "Deep in their sorrow/ and so the rain follows"

"They are in a sign,"- This doesn't quite make sense, and I'm not sure what you were trying to say. I would consider revising it.

Keep writing!