As has been given above, the normal route is a Cruiser for Level 2 missions - you can do them in a Destroyer, but it needs to be well fitted (range) and flown (kiting at range and managing the damage).
There are four T1 Amarrian Cruisers. Which you fly depends heavily on your preferences: do you like to dance around, picking off opponents, or wading in swinging the axe and exchanging blows? Or do you like waging war using technology at one remove?
Augoror: a logistics remote repair ship. Used in fleets.
Omen: a fast (OK “fast for Amarr”) ship for hit and run striking at range with energy turrets.
Maller: a tanky close range energy turret ship.
Arbitrator: a stand off drone “carrier” with some secondary weapons and a bonus to tracking disruption.
Providing a fit is very dependant on your skills. But a few thoughts.
The ships all benefit from training Amarr Cruiser Skill as far as possible. The Maller becomes tankier, the Omen becomes less capacitor hungry and fires faster an s forth.
The Arbitrator is one of the best, and under appreciated drone boats in New Eden. But requires good drone skills, which are less of a priority for Amarrian pilots compared to Energy Turret skills. The downside of the Arbitrator is it’s also bonused to weapon disruption which has almost no usage in mission running. But it’s a cracking E-war support ship for fleets; load it with ECM drones and disruptors and you can cause merry hell for an enemies combat capabilities.
The Maller is less popular than the Omen. Both require good capacitor skills. Which you chose is personal preference, but (in my opinion - my preference OK) the Omen will teach you more about damage and range management.
At this point the two Navy ships; the Navy Omen (Nomen) and the Navy Augoror (Naug) will be rather expensive for you as a new player. The Nomen is a better Omen. The Naug is a tanky brawler like the Maller relying on armour mass rather than resistaces of the Maller.
Train the basics; fitting and engineering skills. Capacitor size and recharge skills are important when flying Amarrian ships. Fitting T2 armour imodules is important, being able to fit T2 medium weapons won’t hurt either.
Well, they will hurt things. That’s what weapons do.
A good website: Eve University as given above is my “go to” for fitting ideas.
If you are online drop me a mail if you need help.