The most economical way of getting to do direct, quality, white light solar viewing is with Baader solar film. I've had a Herschel Wedge for many years and I have a friend that uses Baader film, and the views most of the time are very similar. Under excellent conditions my wedge will show a little better contrast and finer detail but the views of the Sun through his scope with Baader film have been wonderful. Unless you have it side by side with a quality wedge, you wouldn't know the difference.
For $20, you can have enough film for years of use with your 4".
As others have mentioned, the Sun is going through a very quiet time with very few, small infrequent spots. There just isn't much to see right now although I recent read the announcement of the start of the next solar cycle which means spots will start showing up in greater abundance in the coming years.