Deacons are ordained to the ministry of Word, Charity and Altar. The scriptural basis of the Diaconate is in Acts 6, where the Apostles appoint seven Deacons to serve at tables, to free the Apostles for prayer and the sacraments. 1 Timothy 3:12-16 also talks about the qualifications for a Deacon.
Deacons serve at the Altar, but do not say Mass - they may preside at other prayer services, communion services, adoration, and may baptise and preside at marriages. In the Byzantine Rite, the Deacon’s role in the Divine Liturgy is more obvious, he leads all the prayers of the faithful, and raises the gifts on the Altar at the Doxology. The Deacon may proclaim the gospel and preach, and is responsible for the administration of the parish under the priest.
If you’re still waiting to marry, I’d suggest talking this over with your fiancee, as a married Deacon needs his wife to be on board with the idea. The best Deacons, in my experience, have wives who actively share in their ministry, and in the Eastern Rites a Deacon’s wife (or a Priest’s wife) is seen as a vocation in its own right. It’s important to remember that your married vocation comes first, though, and not to enter into marriage as a means to becoming a married Deacon. Something else may come along, you may need to look after a sick or disabled wife or child for example, and you may never attain to the Diaconate - be sure that God will continue to bless you for performing your duties as a husband though.
Great saints who were Deacons include:
St Stephen - the first martyr of the Church
St Vincent
St Ephraem of Syria - a doctor of the Church
St Francis of Assisi
St Lawrence of Rome is another great Deacon saint - and a fantastic illustration of the ministry of the Diaconate - when the Emperor Valerian ordered him to bring him all the treasures of the Church in Rome (Deacons being entrusted with the material administration of the Church) Lawrence brought him the poor, the sick and the orphans, saying that these are the true treasures of the Church. Valerian didn’t take kindly to this and St Lawrence was martyred.
I’m also a young guy, who is also in a relationship and hoping to marry, and I also feel like the Diaconate may be for me some day.
If you’re looking for more information on the Diaconate, you might get more interest outside of the Traditional Catholicism forum, as Deacons don’t tend to have much of a role in the Traditional Latin Mass (the Latin Rite had no permanent Deacons from the 15th century until they were restored at Vatican II) - the Vocations forum and the Eastern Catholicism forum might be better places to look.