Intonation and Auxiliary Words (or how Russians are not really that rude)
Sometimes this peculiarity of the language makes people think that Russians are rude. If you take your Russian friend to a cafe and he doesn't speak English very well, it's very likely that he'll say something like "Give me coffee" to the waiter. The reason is that in Russian you can say the exact same phrase in a very polite way using your intonation, changing the sequence of the words, and using subtle changes in the endings of the words or using the auxiliary words (such as "and" or "so"). For example, "дайте кофе?" (literally - "give me coffee?") can be said with an intonation that means "can I have a coffee, please"; but if you change the sequence of the words and said "кофе дайте" (literally - "coffee give me") that would sound much less polite, more like an order. If you say "а кофе можно?" (literally - "and coffee possible?") actually means "could I please have some coffee, please?".
You can only learn these subtleties through practice, but the main thing you should observe is the raise and fall of intonation in sentences. Another important thing to learn is how various endings, suffixes, and auxiliary words (like "and" or "so") used in different context affect the meaning. Finally, the word sequence depending on the context and the meaning you want to communicate. This is the key to mastering the Russian language.
For instance, in the examples above the intonation rises somewhere 70% through the phrase, making it sound like a polite question. Also, by using "and" ("а") before saying "coffee possible" ("кофе можно?"), you make it sound much more polite. If you omitted "and", it would be very hard to make it sound like a polite question just with your intonation.
Sentence Structure in Russian
Or, say, you want to buy a ticket to Moscow for train #3. In this case you just say: "one + ticket + to + Moscow + for + train + number + 3 = o`din + bilet + v + Moskva + na + poezd + nomer + tri".
So, make up simpliest phrases in your own language (without auxiliary verbs and articles), use the dictionary from the next sections and then say everything in Russian.
If you want to be more advanced, you'd have to learn about all the tenses and grammatical rules, but the best way to get it is through practice. We'd suggest to start speaking first and then the natural way of forming sentences will come later.