You're going to get some not so great seats your first year, like GA or down the LF line or RF line in the sun. Those are not as expensive.
I had seats this year in 103 (under the awning, home dugout baseline, looking straight down the 3rd base line so great for seeing shots down that line), but started out several years ago with just GA tickets, then worked my way into reserved, then under the awning, then close to behind home plate. My wife and I also had several more kids in that timeframe, so my number of tickets increased so I can take the whole family when we all want to go, or give/sell some of them on games we can't all go.
I found my history in my email - it's a little unclear on the exact costs because nothing is itemized, you pay renewal in the fall, any extra costs in the spring, and seat gifts aren't broken out. I'm sure they do it so you don't have to explain to your spouse the large changes all at one.
2022, I had 2 tickets total (first season I had season tickets) - both GA. Total was $200 for the season ($99/per seat + a $1 fee per seat). I think I also had to donate $50 to the LHF to do that. So total 2 GA seats + donation was $250.
2023, I had 4 tickets total - 2GA ($99 each), and 2 Reserved seats in L3 ($175 each). No seat gift, but again, I think I had to donate at least $50 to LHF (I had donated more for football, so I was already good there). I also got a parking pass, which I think was $250 for the season (and totally worth it IMO). So total of 4 Seats (2 GA, 2 Reserved) + Parking Pass was just under $800.
2024, I had 4 tickets total, 2 Reserved seats in L3 ($175 each), 2 Reserved seats in 109 (way up under the awning, last row, $250 each), and I got a parking pass. The total for 4 seats (but in 2 separate sections) + Parking was ~$1,700 for the season. I don't remember what the seat gift was for the seats in 109, but I know there was one. I also missed my slot, so I think I had made a "Seat Gift" in fall for 4 seat gift seats but only wound up able to get 2 in 109, so part of that gift was wasted.
2025, I had 6 tickets total, all Reserved in 103 ($250 each), plus parking. Total for that all of that was about $1,800, but there was also a seat gift required, of I want to say $200 per ticket, so the total would be right around $3K for the 6 tickets, seat gifts, and parking pass.
However, since they are "decoupling" football giving from Baseball giving, I have no idea what that will do to the get in price or seat gifts required going forward.