Advice and thoughts on woman joining Infantry (11B)?

The future looks like Hip fractures and a medical separation board if you aren't already pretty stout and in good shape. It looks like poor promotions if you aren't physically fit enough to score well on your PT tests. It looks like animosity from your team if you aren't fast enough to keep up on the runs, or strong enough to carry the heaviest ruck, or machine gun, or the dead weight of the heaviest guy in the platoon.

If you're up for that challenge, you're fit, and your body has a history of handling physical stress well, then the opportunities are great and the promotions are the best in the Army. If you're not already functioning at that level, Basic training won't suddenly make you stronger and you will eventually break yourself

OK, I"ll give you the same advice that I gave the young lady considering trying to become an Infantry Officer.
Number one, forget about the female side of the APFT. If you can't pass the APFT scoring above 80 percent on the 21 year old male scale, you aren't going to get any respect from any of your squad and platoon mates. That isn't regulations, but it certainly reality. Be ready to live in the field a lot, in conditions were you are cold, or hot, or wet, or a combination of any of those, with little sleep and sometimes little food while carrying 80 lbs of gear for miles. Be aware that everyone gets hurt at sometime during their time as a grunt. I'm lucky, I've pulled ligaments in both ankles and banged up my knees, but nothing more serious than arthritis in the knees as a result.
Be prepared for the fact that Talking Shit is an art form in the Infantry. When your job demands that you put your life on the line, language isn't important, it's simply a test to see how much your buddies can take. Since you don't associate with those assholes in A, C, and D, the people you talk shit to is your squad and platoon mates. You love them, you need them, that's why it's OK to talk about their Mothers. If that bothers you, find a different MOS.
Listen to your NCO's, they will have forgotten more that you will know for a long time in a unit. Understand that you will need to be tactically proficient to gain the respect of a bunch of 19 to 25 year old grunts. Learn your job and be at the top of the game.
The lifestyle of a Grunt is more physically and mentally demanding than most people not on that side of the military can imagine.
Now that I've made it sound horrible, I enlisted Infantry and branched Infantry and wouldn't trade the experience for anything. Infantry and Armor is where the Rubber meets the Road in the Army. It is what the Army is all about. Having said that, I will point out that I ended up my service time at an Engineer Officer, which I liked as much as I did the Infantry.

I have never been in any infantry unit or attached to any infantry unit except maybe during a deployment. I,as a female, do not need fell like putting my body through all that extra vigorous, heavy and physical hardship on my body. I get enough of that in the medical field and doing regular Army training. Nor am I a fan of constantly being in the field,doing a lot field training or deploying a lot. If you are a very athletic female, strong and has a big, sturdy body then go for it. You should also be more emotionally, mentally and psychologically stable and not easily "triggered" by teasing and people messing with you because you will be tested more and looked at more as a female.
Why don't you look into Civil affairs? I think they work in small teams a lot and they are always traveling to obscure and diverse places.