MTG modern general

Hey guys I'm a new player and I bought the Duel Deck Blessed vs Cursed thing because I started playing with my dad so that way we each have a deck to play. I chose the blessed deck but I'm not sure how I should play it. Also is it good against other people or do I need to tweak it before heading to my local store and play against other people there?

Those kinds of decks are made to be expanded before serious use. At least get full playsets of your most important cards. Both decks are good starting points though, they have a lot of space to work with and also have some good stuff in them.

Putting cards you can't fit in your main into your side is a bad idea. The sideboard is for situational cards. What matches is the 4th courier good in and whats don't you want it against?

You can bring anything you like to play casual games in a store, but you'll definitely get more out of investment and research into a deck that's more powerful and suited to your particular playstyle.

It's often recommended to test decks over a freeware program like cockatrice or Xmage before shelling out for the real thing.

Burn player here.
Leyline is overrated desu.
Firewalker and forge tender are much bigger pains in the assignment.

>assignment
Ass
Fuck my phoneposting faggotry

>Infect died when it lost the ability to check if the coast was clear before going all in without having to use anything of value to do it.
I've never played with or against infect, but I often see this. As I've never really seen the deck in action (well I've seen it in videos a couple of times I think), what is the game plan when you gitaxian probe and you see that the enemy does have answers?

Scoop.

swing without using your pump spells, hope to draw more creatures than they have answers

You have perfect info, so navigate around it. If it's a bolt, lead with Mutagenic Growth leading into a kill, they have to cast it to not die but because you can sequence around it you win. If you have lots of creatures and Become Immense in hand just feed your excess dudes to it and finish the thing with Inkmoth. If it's an edict, sit tight until you have two dudes or a Spell Pierce.
And this is false, Infect died because of printing of Push which means now the deck has 3 4-of 1-mana kill spells to grind through, in addition to having a slower average goldfish than Storm and no plan B if your opponent draws more removal than you draw Infecters (noble kills are way more rare than in Legacy with Berserk). Probe was training wheels for pilots who knew what the fuck they were doing, its best use was keeping greedy as fuck zero land openers on the draw and having Become Immense online on turn 2.