Lots of questions - TYP - tickets can be purchased with them. You may want to not do a
travel agent. That way you can buy things separately using points, which you have time to do since you are a year out.
Southwest card: Consider this card but not as the first card.
If you do not have or have not had a CSP or CSR sign up bonus in the last 4 years, sign up for a CSP first. There is a 100K offer on it right this minute and about to expire. The 100K Ultimate Rewards can be used for many things. They transfer to Southwest 1:1. So right there you beat SW's best card offer.
But that said, they are worth more if you use them differently, so get this offer before it ends. Then grab your Southwest card for the flights. More on that later.
Don't be too afraid of annual fees. The CSP (Chase Sapphire Preferred) has a $95 fee but the points are worth $1000 just as a cash out and it goes up from there. You can always downgrade the card after the first annual fee once you've kept it for one year and paid one annual fee.
The SW points do not expire. If you close your rapid rewards account, that will terminate them, but there's no need to do that. The SW thing is a whole other ball game. Depending on who is going on your trip, you may want a companion pass.
I use SW points for my family. I don't willingly fly anywhere anymore. But I often book flights to help out my family.