You touch a nonmagical weapon. Until the spell ends, that weapon becomes a magic weapon with a +1 bonus to attack rolls and damage rolls. The spell ends early if you cast it again. Using a Higher-Level Spell Slot. The bonus increases to +2 with a level 3–5 spell slot. The bonus increases to +3 with a level 6+ spell slot.
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.