First off, congratulations on making the right decision. Start by checking with Titleist to be sure you are booking with a true fitter. Sometimes it's hard to find a proper fitting event so ask around or check here for recommendations. If you need to travel a bit to find one, it's well worth it. Ideally it should be outdoors and on real grass (that's how most golf is played). Bring your current clubs and arrive early enough to get a few swings in so you're warmed up and ready to go. Let them know what you're looking for before you start and be honest about your game. Don't brag about how far you hit the ball or what your swing speed is, and if your game is off a bit that day don't worry about it. Just stay calm and swing your normal swing. A true fitter will evaluate your swing and determine what shaft, lengths, flex, etc. works best for you and for what you expect from your clubs. They usually charge a fee now but you can apply that to the cost if you're committed to buying. Enjoy it. Being your first fitting, do it right and it will be fun and educational. You will be surprised at the benefits a minor adjustment can make in your game. Be prepared though - you'll never want to buy clubs again without a proper fitting.

My preference is an outdoor fitting for most clubs, especially irons and wedges. Short of playing St. Andrew’s in January I never play off of a mat. Depending on the weather conditions where you are living will impact when you can get fit outdoors.

At the top of the web page is a fitting tab. Shops that do outdoor fittings in your area are listed. If there is an option for either a TT fitter or a Premier site, they would be my first choice. Expect to pay a fitting fee, although it may be reduced or eliminated with a purchase. The fee and conditions will vary.

Bring all your clubs. A good fitter will want to know your game to help with picking a starting point. Try not to look at the club head and shaft. Once you both agree what works best, then have him explain the choices.

Good question but at the end of the day it is your choice on clubs you carry

I would say that I see so many guys carry a 3 wood which they cannot hit correctly or get any real shape of shot from it ... I am lucky I can hit my 3 wood so many different ways

Don't worry what other people have in the bag it is how you play the game which should give you your options

Talk to your fitter. Explain your game, describe your misses and give feedback on how the club feels when you hit it. It sounds pretty complicated but with the help of a good fitter, the process is super smooth and you probably won't leave with any questions unanswered.