What do you mean by easy?
In terms of money, there are several things you will need that you don't think about when first getting into it....
1. Bow obviously
2. Arrows
3. Arrow points
4. Glove or tab
5. Arm guard
6. Quiver, atleast one
7. Stringer
8. Bow sock
9. Tip protectors
10. String keeper
11. Bow square
Obviously, you don't have to have some of those things, but most do...... So, the initial investment can be very expensive....
Now as far as how easy is the transition from compound to trad........... I think it depends on what your view on hunting and archery is all about....... If you are obsessed with killing deer, you may want to to stick with the compound, it will more than likely double your effective area...... But, if you are looking for a sport to enjoy year round, something that is challenging and rewarding, nothing compares to traditional archery......It's like golf, but much cooler

I've never played much golf, but I think it has many parallels with trad archery. It's largely about form and technique. I must be practiced regularly. It's an extremely mental game. And you are really your only opponent.
Now, once you get started, things can be tough....... I tried the trad thing a few years ago, but gave up after a few weeks of not enjoying what I was doing. I WAS OVERBOWED!!! That's not fun!!!
This go around, I got a bow I could handle and I started out at 10yds....... I was barely able to keep all 4 arrows in the microwave sized target..... But, each day I noticed things got easier and easier. Now, I can keep 4 arrows in a soft ball type target at 15yds.... Its taken about 6 months to get there.... That may not sound like alot of improvement, but for me it is!! Hopefully by this time next year I can shoot 4-5 inch groups at 20-25yds.. Without the Internet I could have never made the transition....... There are just SO many things about trad archery that must be learned, that without others who have experience to guide you, you are up against an almost impossible foe...... Various different styles, holds, etc that must be worked out.....Without some really good one on one with a trad shooter, you really have to have a desire to learn and absorb. For instance, I probably spent 20hrs reading posts about shooting this weekend on another site. You have to be willing to invest that time to gain insights from others who have walked the path your on.