0. Don't waste time growing food. I ate Natura berries the entire game. LOL Do grow Immersive Hemp, in prep for step #1 but also for the string source. Use the string to make ProjectRed backpacks so your first few mining trips are more productive, less traveling back and forth to unload stuff. Speaking of "stuff"... Storage Drawers are your best friend. 'Nuff said!
1. Immersive Engineering is ideal for early-game power. Make a Coke Oven right away to get started. Windmills look nice, but I go with triple water wheels, they're the best early-game power source IMO. Spam em, I ran 8 of em, and they make my base look goood.
2. Make IC2 processing and get started on IC2 nuclear power ASAP, for the plutonium.
3. Take that plutonium and make your first small Big Reactor (is that an oxymoron?).
4. Meanwhile - and it will take a while to complete step #3 - you should be working on getting a Division Sigil, doing the ritual to get Cursed Earth, and making a Cursed Earth spawn pad with mob grinding capability. Further, place an MFR Auto-Spawner in the middle flush with the Cursed Earth, and make your setup do double-duty. I use it mainly for glowstone (running Witches) but I'm getting ahead of myself, that's for Quantum Solar Panels later on.
5. While working on #3 and #4, you also should be working on the Recycler-Mass Fabricator-Replicator-Scanner-Pattern Storage chain of IC2 processing, so you can start making Iridium Ores via UU Matter. Spam the Recyclers, feed them cobblestone from a cobblegen, and Cyclic Assemble scrap boxes for use in the Mass Fabs. Don't make more than one Mass Fabricator to begin with - they will accept any amount of power you can feed them, so only add multiple when you're really flush with excess power supply later in the game.
6. While doing #3, #4 and #5 (get used to this), you should be gunning for an Ender Quarry. The sooner you can begin quarrying, the faster your progression will go... because your raw material supply will get a real boost. Start small, with a 1x1 or a 2x2 chunk quarry, but with each run of the quarry, use your raw materials to make more power sources - I recommend more IC2 nukes, but its really up to you.
7. While grinding thru #3, #4, #5 and #6, you should be working on a good way to convert EU to RF, and RF to EU - you do this via HV Immersive Cables connecting between MFE's (or CESU) and Tesseracts (or Thermal Exp. Energy Cells) as discussed in
this thread. Flexibility with your power sources and power supplies will greatly increase your ability to adapt when required. Due to the nature of the modpack, you cannot build big huge power sources right away, so you are forced to make many small, varied power sources. Being able to "focus" all this power on one task (such as running the Ender Quarry) is critical IMO.
8. By this point, you should have upgraded your Big Reactor a few times, added more IC2 nukes, upsized your UU Matter processing line, and (after a few hundred hours!) be ready to make your first Big Reactor Turbine. You should have gotten to the middle speed upgrade on your Ender Quarry, as well as Silk Touch upgrade, etc. Basically, things are moving much faster now, and you don't feel nearly so lost or feel like it's gonna take forever to get anywhere in the modpack. You HAVE gotten somewhere, and now it's accelerating. You don't need any more spoilers, you are now well on your way to being an Infinity Evolved Expert!