I'd like to read along with the Liturgy and especially Vigil because I can't make out much of what's said and especially what's sung but my priest said "no". Is "reading along" universally prohibited or is this a "priest specific" thing ? Don't worry, I'm not going to rock the boat in my church or start a revolution ... I'm just curious.
Here is my advice: Reading for comprehension during Divine Liturgy is not a good idea. It is straightforward and simple service, with few variables. The daily troparia are usually published either in the church bulletin or by the national, diocesan or deanery Internet sites. You can easily read the service in the comfort and privacy of your home. If you are really into understanding it, I recommend these books: Divine Liturgy: A Student Study Text
by Father John Peck, and For the Life of the World
and The Eucharist: Sacrament of the Kingdom
by Father Alexander Schmemann. In any case, if your parish encourages congregational singing (along the choir), try to do so. It is most important to be a participant and not a recipient, observer or student, particularly during the Divine Liturgy.
Vigil is a different story. First, it is much more complex service and has many more variable parts. Second, most folks attend Liturgy more often than a vigil. Again, if possible, sing along the choir (never chant with the chanters as it may have disastrous results). There are constant parts, but the variables are so many that it would be simply impossible to have the resources available to you in one neat little package. I think it would be best to read the service beforehand rather than during.
Another problem may be that your priest, readers, chanters, choir are difficult to understand. Not all of the servants of the Lord are equally gifted with good diction and voices. In that case, thank the Lord that he has gifted you with the challenge of coping with their shortcomings.