To use the baseball bat, you will need to equip it as a melee weapon in the Loadout menu. This can often be done by selecting it in your equipment or weapon loadout during the class creation phase.

Once in-game, you can perform a melee attack by pressing the melee button COD BO6 Boosting. 

The baseball bat, like other melee weapons, can be used to take down enemies silently or engage in direct confrontations. Be mindful of your environment, as using a melee weapon may be noisier and may draw attention.Use the baseball bat in close-quarters situations where stealth and surprise are on your side. It can be advantageous if you are flanking enemies or if you spot an unsuspecting foe.

   In some game modes, melee kills can contribute to killstreaks or score streaks, so you might want to focus on using the bat strategically to maximize your points or unlock rewards.Practice using melee weapons in gunfight scenarios to improve your timing and positioning. Knowing when to switch to a melee weapon can be crucial in tight situations.

If "Black Ops 6" includes unique mechanics or changes for using melee weapons like the baseball bat, those specifics would typically be released with gameplay details around the game’s launch. For the most accurate and detailed instructions, keep an eye on official game guides, community forums, and the game's official website after release.

For the very latest mechanics and specifics regarding "Black Ops 6 buy cod bo6 ultimate camo bundle," I suggest checking the latest community discussions, patch notes, and guides that emerge following the game's release.