The links on this page may be useful (since it is a Vipassana Tradition in Sri Lanka): Nā Uyana Aranya -- Theeravada Buddhist Forest Monastery
The Information for visitors says,
Ordination
For laymen interested in ordination the following books are useful to read:
- The Buddhist Monastic Code Vols. I & II by Bhikkhu Thānissaro 2. Vinaya Notes by Ajahn Brahm 3. The Bhikkhu Rules, a Guide for Laypeople by Bhikkhu Ariyesako
APPROXIMATE TIMELINE TO BHIKKHU ORDINATION
1-4 months: Upāsaka (8 Precepts)
6-12 months: Pabajjā (going forth) and abiding as a Sāmaṇera (Novice monk) (10 Precepts and 75 Sekhiya rules)
January – March: Vinaya Classes
April: Vinaya Exam
June: Upasampadā (higher ordination) at Galduwa Monastery