There are no rules for resting a pipe except this one: a pipe needs to rest. It isn't a question of what one believes or doesn't believe about briar needing to rest – this isn't a religious disputation on matters of faith and belief. Briar, being wood, will absorb, and the more you tax it's ability to do that the sooner the taste will be compromised. I went through that stage long years ago when I was an undergraduate, and I enjoyed my one good pipe so much that it eventually soured on me. Because it's a slow process, it's rather insidious, but it happens nonetheless. I was able to bring it back, but I learned a valuable lesson from a master Pipe maker about allowing my pipes to relax between smokes.
These days with over 100 briars in my collection, I try and allow at least a week's rest after I've smoked a pipe – even if the smoke was so spectacular that I want to repeat the experience. I also have about 20 corncob pipes and eight mirror's arms to allow my briars to get all the rest they need. And here's the point, if cost is an issue, and you can't afford a full stable of briars, buy a corncob pipe. They give a first-rate smoke, and are not in the least bit déclassé. Before my retirement when a suit and tie were normal working attire, I had no qualms whatsoever about smoking a cob. I've been a fan of Missouri Meerschaum for over 50 years, I now have fallen in love with the new entry in the market: the Old Dominion Cobs, a truly superlative smoke that will give a briar a run for it's money any day of the week.
As time passes, you will increase the number of pipes you have, but at the very beginning, the best advice I can offer is let your pipes rest, and invest in a couple of corncob pipes, they can take the abuse, and if they should wear out, burnout, break, gets lost or anything like that, you're not out big bucks.