I am an RV6 owner who flys “light” IFR and an instructor who has had RV instrument students, my thoughts and opinions.
1. You can do it. Not sure of you panel, but I will assume since you are asking it is IFR capable (a planned layout and not an afterthought).
2. The very qualities which make for nimble handing, a sporty feel and light akro make for a less than stable instrument platform. Make no doubt about it, the RV has the ability to steal your lunch money. It is not a great instrument platform for turbulence, low wx, ice etc.
3. Be open minded and find an experienced instructor CFI-I, preferably with RV time. A “college factory” CFI may not be your best choice; your plane is not the world he/she came from.
4. You will have to have a better scan/workload management than a pilot flying a Cherokee or Cessna. Your success depends on your skills. GA pilots range from really good to not so good (the military washes MOST, but not all, dip****s out. The fact is; maybe the RV is not best for you. You and your instructor will have to be honest and assess.
5. You REALLY need to ask what your IFR goals are. There is a lack of deice/anti ice equipment. Also a lack of redundancy in avionics etc. Do you plan to just become a better pilot/fly with precision and understand the ATC system better? Do you plan to use the plane to fly thru summer haze, get “on top” , get thru light rain and manage with clouds enroute? Or, do you plan to punch into the clouds at 200’ and fly an approach to minimums?
6. IMC flying is risk management. If you fly IMC YOU WILL: pick up unanticipated ice, have an electrical failure/radio failure, lose your alternator (at night/over the mountains), total electrical failure, not be able to turn on runway lights and likely have a smoke event or two etc. In the back of your mind, do you have the skills to fly with no electronic assistance?
7. The autopilot is a great workload reduction tool. The autopilot SHOULD not be a replacement for skill, proficiency and be used to make up for lack thereof. Did I mention the plane can be a handful when writing a re-route, searching charts for fixes etc. Ask yourself if you are safe if the auto pilot fails. My opinion, NEVER takeoff in weather/conditions that your skills will not let you hand-fly/manage without the autopilot.
8. To the greatest extent, handily all climbs and descents. When I give Flight Reviews, the sooner a pilot turns on the autopilot is usually indicative about their skills.
If nothing else; you will be a better pilot and safer with the training even if you never fly IMC. Nighttime flying will be much safer.
With that said; approach it with a professional attitude and mindset and go for it. Aim for perfection and nothing short of that.