I have only taken 2 semesters of Spanish at my university. I am thinking of going on a Spanish study abroad trip to Mexico, through my university. It will be for a total of 6 weeks. The issue is that I am not sure if i am linguistically ready for this. My Spanish does not sound great and this normally makes me really hesitant to speak in Spanish, but i truly do want to learn the language. I am just scared that I am going to be completely lost. Does this sound like a good opportunity that I should go for even though I am just a beginner?
The best way to learn a language is to go where you’ll have to speak it. If you have some of the basics of grammar down, you need only add to your vocabulary, and that is what study abroad is for.
agree with @Massmomm: the only way you really learn a language is to put aside the fear of making mistakes and just do it. If the study abroad requires you to speak and live in Spanish then it will help you do that (not all of them do- in some groups of students can keep speaking their native language to each other, which is a waste of time and money and should just be called tourism).
Be aware that you will have times where you feel lost. You will have times when people just don’t understand you and you have to struggle to find other ways to say what you are trying to say. You will speak like a kid (simple, declarative sentences, mostly in the present tense). Your brain will be tired at the end of the day. The first week or two you probably won’t think you are making any progress at all, and at some point around the 4 week mark you are likely to have a moment when you are tired of it being hard all.the.time.
But: if you take it seriously and make yourself stay in the Spanish (seriously limit talking or messaging in English) you will be amazed how much your Spanish can actually improve in 6 weeks. When you hit the wall of being tired and discouraged, remember that it is completely normal and it will pass- and when you come out the other side your fear of speaking will be largely a thing of the past.
Ok so in our digital age this is what I would do:
Take the opportunity BUT for safety reasons I would get some kind of international data plan so you can look up your own directions, use a translation app, etc.
Hi, manzano8. If you are concerned about studying abroad, I would during this time before doing so seriously bulk up on the essentials: navigational terms, basic vocabulary (like food and fundamental adjectives), and most importantly hearing (so watch some telenovelas or Spanish dubbed series). Most people are fairly helpful, but you have to help the locals help you to help you. 
Bring vocabulary lists and English-Spanish dictionaries ((on your phone especially) to fill gaps.
Do you live anywhere near Spanish speakers that you can communicate with for practice?
I guess I can’t edit posts. Let me add too that listening to Spanish music will help you a lot as it will help you distinguish words more efficiently and at a quicker pace. And of course, there’s a lot of us that can help you (including me) with some Spanish dudas if you want them cleared up.
You are ready. I have done these types of programs. If you are doing an intensive language and culture program, your language ability will skyrocket. There is no “ready” to be honest. You go with the level you have, and you come back speaking a heck of a lot better! And that´s one of the main objectives!
You´re ready! Have fun!