Proceed to the right and kill three soldiers you will come across one-by-one. Once you land in the desert, shoot the sign with the arrow on your left a few times for a hidden item. It only takes a few quick playthroughs to get familiar. It's fairly straight-forward to do so long as you take your time and get familiar with the enemies, what they do, where they spawn and so on. Aim to stay alive in the first and second missions so you won't have as many points to earn later on. I'll be providing as much text-detail as possible for each mission but if you'd prefer to just watch each video for the different modes, scroll right down to the bottom of each walkthrough page. If things are different, it shouldn't have much impact on your playthrough. For example, the business man in the blue suit you will see near the start of Mission 1 in the video may be replaced by another arabian for you. Enemies, their spawns, weapons, etc, will always be the same but less important stuff like NPC characters, the items they may or may not drop can change so you may see different things in your playthrough compared to my video. Sometimes, not everything is the same in different playthroughs of the game.