Hi Penny,
These are probably not ideal chords for beginners to be practicing. I was able to manage them on a tenor, so they are reachable, but it would be difficult for small or unpracticed hands.
Tabs are read as if you're looking down at your fretboard with the headstock to the left and the body to the right. The top line is the 1st string (A), the next is the 2nd (E), then 3rd (C), and the bottom line is the 4th string (g). This is assuming you're using a right-handed instrument strung in the typical gCEA. You play the fret that's numbered on the line, with 0 being open (no fret).
So that first chord had my pinkie on the 7th fret of the 1st string (E), index on the 3rd fret of the 2nd string (G), ring finger on the 4th fret of the 2nd string (E), and middle finger on the 4th fret of the 1st string (B). Don't start with the pinkie, do that last after you've got your other three fingers in position.
The second chord is more straightforward with pinkie on the 9th fret of the 1st string (F#), middle on the 5th fret of the 2nd string (A), index on the 2nd fret of the 3rd string (D), and the 4th string open (g). Again, do the pinkie last.
Context is everything, and I'm not sure what song(s) you wanted them for, but using those notes, I have some possible alternatives that are easier and might be suitable:
The first, 4-4-3-7 chord could be played: 0-4-0-2. Read the numbers as 4th, 3rd, 2nd, and 1st string. This keeps the same notes, but you lose that high E. If you want to keep the high E, you could try: 0-4-7-7.
The second, 0-2-5-9 chord could be played 0-9-10-9, which keeps the high F#.
I think these alternatives work whether you're playing with a high or low G ukulele. There might be better alternatives, but it's difficult to say without hearing the surrounding music. And really, these chords are a bit ambitious for someone very new to ukulele.
Oh, and the squiggly line means the chord is arpeggiated, which is a fancy way of saying you play the notes consecutively instead of at the same time. Don't completely separate them--they still share a beat, but you kind of roll them. You can do this by either playing a slightly slower strum or by pulling/plucking each string in rapid succession with your right hand (usually thumb, index, middle, and ring finger). Strumming is easier, but if you want to learn how to play fingerstyle, you should learn the latter too. Your left hand just frets each string like a normal chord. Unless indicated, the direction of the arpeggiated chord is usually from low to high (4th string to 1st or down strum).
Hope that helps!
Edit: To make it less confusing, I reversed the number order on the chords to read like everyone else's.